Answered in 7 minutes by: 6/21/2009. If excess current flows through the fuse, the metal strip will heat to its melting point and break. - the F3 4 amp fuse keeps blowing - the T3 Resistor looks bad (see pic) So could the T3 Resistor (if bad) cause the F3 to blow? The better fans are no doubt better protected than the cheapy ones. I found something!!! Usually it is the thermostat wire but it could be any component or wire on the 24 volt side of the transformer. UniMotor series enclosure. Generally, coil voltages are 250V or below. The fuse would blow when the unit shut down after a cycle or two, that suspect me to check anything that’s working at the end of the heating cycle. What is my next step? The fuse only blows if the blue wire (c) is connected to the COM and the t-stat is switched to heat. Mixers, blenders, Motor-loads for household appliances: eg. Replaced contactor and 3 amp fuse and still blowing fuse. $7.99 $ 7. Page 1 of 1 Start over Page 1 of 1 . FREE Shipping on orders over $25 shipped by Amazon. ... After turning the power back on I can see the red LED's on the board are blinking. A new fuse was put in and this also blew. This load amperage is the amount of current required to power your device at the line voltage. However blows as soon as you turn on pinsetter. First thought was change the fuse, which I have this time for a 3 amp. An ampere, or its abbreviation "amp", is a unit that is used to measure electrical current. Also Calculate Size of Overload Relay if O/L Relay Put in the wingdings (overload is placed after the Winding Split into main and delta… I'm far from an electrical expert so This can be a good way to teach how circuits, voltages, and amps work. the current the contactor can safely disconnect) is rated as 75amps, but with higher temperatures, this rating is obviously reduced with plain copper contacts. Thanks!!! I replaced it and everything worked fine. Checking line side L1 to load side L2 I get 480 volts. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Pack of (2) $11.80. Can anyone tell me what the specification is? Auxiliary contacts allow additional operations to take place when the contactor is energized. Another consideration is whether the motor operation requires reversing of the direction, in which case a reversing contactor would be required. For example, if you have two applications, both using the exact same motor, but in one case the motor will simply be turned on for long periods of time, while the other will be turned on/off constantly, you will likely use two different IEC contactors for each application. Status Not open for further replies. All rights reserved. DIY and save $300-$500. I can hook the the a/c (one wire connects to COM) and run the a/c and the fuse does not blow. Where should I start my search? Adding additional contacts to a contactor is inexpensive and could save you time and money if you take the time to review the operation as a whole. 3A Fuse on Circuit Board Keeps Blowing. … read more Check the transformer for any faults. Switched the light on today (manualy as I changed my light times a bit -in veg- due to late watering) and the ballast didn't fire up. BillyHvac, Journeyman HVAC Tech. Hello everyone, I've used some advice from previous threads to get me as far as I am with this issue, but I'm stuck again. I did some researching and found out it was the 3A fuse. Worn and/or Faulty Parts. Fans, central vacuum, Hermetic refirgerant compressor motor control with manual resetting overloads, Hermetic refirgerant compressor motor control with automatic resetting overloads, Control of resistive loads and solid state loads with opto-coupler isolation, Control of solid state loads with transformer isolation, Connecting and disconnecting under no-load conditions, Switching of resistive loads; including moderate overloads, Switching of mixed resistive & inductive loads, including moderate overloads, Switching of motor loads or other highly inductive loads, Protection of circuits, with no rated short-time withstand current, Protection of circuits, with a rated short-time withstand current, Non Inductive or slightly inductive loads, resistance furnaces, heaters, Shunt-motors, starting, plugging(1), inching(2), dynamic braking of motors, Series-motors, starting, plugging(1), inching(2), dynamic braking of motors, Control of D.C. electromagnetic loads having economy resistors in the circuit, Switching of resistive loads, including moderate overloads, Switching of mixed resistive and inductive loads, including moderate overloads (i.e. 3 amp fuse blowing on air handler board....narrowed it down to red wire out to heat pump.... red wire traces directly over to defrost board...I see a little discoloration on two resistors on the board … read more. I do not know if the fuse blew during operation, shutdown, or when the next request for cool happened. The 3A fuse on a furnace circuit board can keeps blowing because of a faulty transformer or damaged thermostat wiring. Get it as soon as Wed, Jan 20. Choose your motor horsepower, input voltage and single or 3 phase from the drop downs and the calculated full load amperage is displayed. If you went through this test and it suggests a bad tube, continue on to locate the bad one: Testing Rectifier Tubes (5U4, 5AR4, 5Y3): Been a few minutes and the fuse still hasn't blown, but I know it will eventually. In previous blog posts, we talked about the differences between IEC vs. NEMA and discussed the basics of a motor starter. Both match a contactor with the job it has to do, but they do so in different ways. IEC uses utilization categories, or “codes”, to describe specifically the type of electrical load and duty cycle of the load(s). Looking for SCHNEIDER ELECTRIC 120V AC IEC Magnetic Contactor; No. apparently no shorts on low or high voltage side. Below is a chart of the utilization categories for IEC contactors. Only 8 left in stock - order soon. It’s not just a question of what type of device you are powering, but also how it may be used. I have a carrier cental air unit that keeps blowing 5 amp fuses. If the wiring is shorted, the contactor is stuck or the contactor coil is bad, this could cause the fuse to blow. What is causing the fuse to blow? This can be the same as the line voltage, however often a lower voltage is selected for the contactor for safety purposes mask,front desk still blows. CompStudio 10Pcs/lot T3AL250V 3A Slow Blow Fuse 5x20mm 250V 3 Amp Glass Tube Fuse Time Delay Fuse (3/16 in x 3/4 in) 4.2 out of 5 stars 13. Unless I am missing something, at 2.3 ohms it would draw more power than a 3 amp fuse can provide. Blown 3 Amp Fuse in AC quick fix - Save $300-$500 - YouTube The most common mistake we see is incorrectly choosing AC-3 when AC-4 would be more appropriate, resulting in a shorter lifespan of the contactor. James. You should next confirm the control voltage to be used to power the contactor. The contactors can be coupled with the following fuses: – V7 with fuses from 6 A to 450 A (up to 315 A for motor protection; up to 450 A for capacitor bank protection) – V12 with fuses from 6 A to 200 A. PowerCube series unit. Technician. The replaced fuse worked for 2 months. I am still popping fuses and reading over 24 volts. 99. Cylindrical fuses consist … Heaters, Squirrel-cage motors:  starting, switching off motors during running time, Squirrel-cage motors: starting, plugging, inching, slightly inductive loads in household appliances: eg. (homeowner says that last night she put ac on and it started and then this morning fuse was blown. I have replaced the control board, contactor and the transformer. Matt Vernon New Member. Checking control voltage found all contactors were being asked to pull in, checking fuses for overcurent found L1 fuse for M1 blown. Heating & Air Conditioning Contractor. The 3 amp fuse on my control board keeps blowing. Proceed with caution, as some fuses can explode when they are blown. Easy online ordering for the ones who get it done along with 24/7 customer service, free technical support & more. 3 amp fuse keeps blowing everytime I reconnect the thermostat. 3 Amp Control Board Fuse Keeps Blowing. FREE Shipping. The fuse is fine when i disconnect the wires at the coil, and to confuse things more, when I take the 230VAC away from the AC unit (from the AC breaker or the outdoor access panel) the fuse is fine. I measured the electrical resistance on low voltage side of the contactor and it is only 2.3 ohms. HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 10 years ago. For example, you could use a NEMA Size 5 contactor to … The 5 amp fuse on my control board blows as soon as you ask for heat. This is important because these will in part, determine which contactor you use. Power is ran through a 240v 3 phase 60 amp breaker, currently the breaker is running 50 amp fuses. Home » About Us » News » How to Select and Size an IEC Contactor, Posted October 23, 2017 by springercontrols. Today we’re going to talk about selecting a contactor for your application requirements. (At least on DC circuits). Choose your motor horsepower, input voltage and single or 3 phase from the drop downs and the calculated full load amperage is displayed. An incorrectly specified IEC contactor may work for a period of time, but the lifespan will be severely reduced. I have checked all leads/cables in the airing cupbaord are not pinched/uninsualted and there are no water leaks evdient. If jumped system would start and function fine. This was done after I couldn't get an appointment soon enough for an AC repair person to come and check out when my AC is dead. Grainger's got your back. I have a carrier cental air unit that keeps blowing 5 amp fuses. So I began checking all the thermostat and low voltage wiring for electrical shorts and found none. I also found several pinched wires as well. 1. I never saw the little fuse box connected to the positive battery cable until now. Checked contactor and it was burned. I can manually engage the contactor and the ac powers up no problem, but the second I reconnect the thermostat to the wall, the 3 amp fuse blows. hi all, after a bit of advice. Only 4 left in stock - order soon. Copryright © 2021 Springer Controls Company ®. The valve amp was blowing a fuse every time the standby switch was turned on. Basic Calculation of Motor Torque… Reactions: birddoctor , Jeff B , BigJim55 and 1 other person we have had problems with the 3 amp fuse tripping but only when the heating is on it doesn't do it when the hot water is on.we had a plumber/electrician come and he replaced the valve,thermostat,hot water and heating controls and the box with all the wiring in . Weak with electric and weak using meter. Well tonight, randomly, the ac shut off. Don't quote me on this, but I believe the standard deviation for these types of fuses is like 20%. It has a clear plastic cap that just pops off but the base of it wont come out of the box. Springer Controls sizes our contactors for 10 million operations to ensure long life. Current can be defined as a count of the number of electrons running through a circuit. This can be the same as the line voltage, however often a lower voltage is selected for the contactor for safety purposes. Gaztech. So, I went to start it yesterday, and nothing. I let the unit run the A/C. Satisfied Customers: … Price $116.68. Category: HVAC. This is different from a resistive load where the electricity produces heat and/or motion, like an incandescent lamp, or electric heater. Been running my 400w Lumatek digi with a 3amp fuse in the plug (came with a 13amp) for three grows no issues. I did and found out it was burned. With a good fuse in the AC work fine and you can switch the fan from Auto to Fan on with no problem. My 3 amp fuse is blowing on the circuit board. The 100A fuse is clearly blown but I havent a clue how to remove it. Choosing the right utilization code will extend the life of the contactor. Anyway, in March, the 3 amp fuse on the internal board in the furnace blew....the system was installed 2 years ago, and I didn't hink much of it. Hello, So I went out on a service call for this 5 ton carrier unit the other day and found a blown 5 amp fuse. (See manufacturing data) Stock 70 amp contactor Performance 200Amp Contactor Stock 70 amp contactor Performance 200Amp Contactor Stock OEM 100 amp contactor I tried sending 24 volts straight through the A/C contactor + wire, which I did to test the system when I first installed 6 years ago, and instead of turning on the outside unit, it blew the 3 Amp main board fuse. The motor that will be turned on/off constantly will require higher current loads and thus require a larger contactor. How long have you been dealing with this? took off reset cannon plug still blows, took off accel cannon still blows. That means that your 3 amp fuse could be anywhere between 2.4 and 3.6 amp. 3. I checked and the furnace was off, fuse blown and thermostat was asking for cool. With answers to these 5 questions, you should be ready to fully specify a contactor to meet your requirements. Obtain a fuse. The NEMA selection process always results in a choice of a contactor you can use over a broad range of operating conditions. BOJACK T3AL250V 5x20mm 3A 250V Slow Blow Fuses 3 amp 250 Volt 0.2 x 0.78 Inch Glass Tube Time-delay Fuses(Pack of 20 Pcs) 4.4 out of 5 stars 17. This is significant difference. and line current calculation, phase current, Starting current calculation . The amp probably has a bad SILICON DIODE. If YES, then the amp is likely okay, and you simply have a bad tube! Blower Motor – A failing blower motor draws too much power and may cause a short. Took the panel off, and the fuse was blown again. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Pack of (2) $11.80. I know the T-stat wire was good, replaced all new. Generally speaking with motors and other industrial equipment, you want to look at the nameplate to confirm the input voltage and the Full Load Amperage (FLA). Contactor Coil Voltage . Those part numbers are LVU 804171 for the 1.5 Amp diode. The voltage out of the transformer reads 26.3 volts. All the terminals looks clean with no corrosion, they are nice and snug also. If a motor will be jogged or have frequent stop/starts, then it should be accounted for by choosing a slightly larger contactor. We see this on occasion with contactors that become stuck in the open position due to corrosion or objects becoming stuck in the contact points. Our boiler has no fan so I presume it is the pump. I have a Goodmand Heat Pump Package Unit M#GPH1342M41AC unit is about 7 months old. 1. M2, M3 and M4 were running ok. With blown fuse still installed checking from line side of fuse L1 and load side of fuse L1 for M1, I get 480 volts? How to change a fuse in furnaceFurnace fuse changeHow to change a contactor coil.Blown Furnace FuseGoodman furnace won't startFurnace won't startFurnace low voltage shortAC fuse shortGoodman furnace fuse repairGoodman Furnace fuse shortCircuit board in AC keeps blowingNo heat low voltage shortFurnace blowing low voltage fuseVoltage fuse burnAC won't turn onCircuit board in AC keeps shorting (If NO, and the fuse has blown again. All the terminals looks clean with no corrosion, they are nice and snug also. $19.25. Furnace is giving me a 24 code. Blowing Low Voltage Fuse Breaker Trip | Control Wiring Troubleshooting - I’ve got a 5 amp fuse that keeps popping on a circuit board. Calculate Size of each Part of Star-Delta starter for 10HP, 415 Volt Three Phase Induction Motor having Non Inductive Type Load, Code A, Motor efficiency 80%, Motor RPM 600, Power Factor 0.8. Motors are what we call “inductive” loads, meaning there is an induced voltage due to the rotational effects of the motor. V=IR, or so I always thought. the amp draw on the comp … read more. Calculate Size of Contactor, Fuse, C.B, O/L of DOL Starter Calculate Size of each Part of DOL starter for The System Voltage 415V ,5HP Three Phase House hold Application Induction Motor ,Code A, Motor efficiency 80%,Motor RPM 750 ,Power Factor 0.8 , Overload Relay of Starter is Put before Motor. $7.99 $ 7. I checked the fuse, and sure enough, its blown. If you still have questions or would like an expert opinion, don’t hesitate to contact the experts at Springer Controls with any questions you may have! Witonics 12A 250V Fast Blow Glass Fuses 6x30mm (Pack of 5) 5.0 out of 5 stars 5. in the Gas Engineers Forum area at PlumbersForums.net. Use it for guidance, but please always refer to the equipment nameplate for the specific information whenever possible as the FLA can vary greatly due to a variety of factors. 3 amp fuse blowing on air handler board....narrowed it down. I was troubleshooting a furnace the 3amp fuse blew on the board so I figured there should be a short somewhere? A reversing contactor is an assembly of two contactors (one for each direction) joined by a mechanical and/or electrical interlock to ensure only one contactor is energized at a time. Non-inductive or slightly inductive loads, eg. … I replaced the fuse and used the thermostat to turn the fan on followed by the heater then the A/C. A good idea but depends what the instructions say. This turned out to be true. of Poles 3, Reversing: No, 9 Full Load Amps-Inductive (3DY20)? After blowing the 3 amp fuse on my furnace board several times trying to troubleshoot the issue, I just replaced the contactor coil on my outdoor unit. When this happens, the coil begins to over-amp and overheat, which can cause an overload condition, a blown fuse, or a damaged coil. The unit runs ok for a few days and presto the fuse popped again. 0. Discuss Potterton suprima 40 blowing 3 amp fuse & rcd. If you have a gas-fired furnace, disregard this. I took off all the wires of the dummy board and jumped out r & W furnace turned on fine but as soon as I put on the wires for the condensor on Y & C fuse blew again I checked the 2wire running … These could include the following and may be indicated by strange noises emanating from your furnace: Starting Capacitor – If the capacitor that starts up the system is failing, this can cause intermittent electrical problems. current rating (i.e. I replace the T-Stat wire from the stat to the unit, to ensure that the fuse was not tripping due to a pinched wire. 99 ($1.60/Item) FREE Shipping. It's getting cold out tonight. The issues we are having is the 3amp fuse keeps popping. Power is ran through a 240v 3 phase 60 amp breaker, currently the breaker is running 50 amp fuses. Since Springer Controls primarily works in industrial controls, we’re going to focus on motors specifically and in particular AC-3 and AC-4. Model #CB29M-41-2P AIR HANDLER. Can you help? $7.99 $ 7. Something is shorting to ground. Hey, I have exhausted my troublshooting ability...I need some direction. Motor Full Load Amps Calculator. Part number for the 3.0 amp diode is LVU801850. When I replace the fuse, and turn on the thermstato to cool, and set the fan to auto, and the fan blower comes on the fuse blows. (See manufacturing data) Stock 70 amp contactor Performance 200Amp Contactor Stock 70 amp contactor Performance 200Amp Contactor Stock OEM 100 amp contactor Hey, I have exhausted my troublshooting ability...I need some direction. The furnace has been serviced numerous times over the past two years for various problems by multiple service companies. (Bingo, the old one is drawing too much current and blowing the fuse.) Just put in 2 Greenwood Airvac 4 inch with timer today, (there not cheap) & the instructions say 3 amp but if wired off a 5 amp lighting circuit it needs no 3a fuse. YOLISTIC (Pack of 10) 12 Amp Slow-Blow Time Delay Fuse Ceramic 6x30mm . Next. airheatman. Show More. L3 fuse is good. Compstudio 10Pcs F12AL250V 6X30MM 12A Fast Blow Fuse 12 Amp 250V F12AL Glass Fuse Fast-Acting Fuse (1/4" x 1-1/4") 3.5 out of 5 stars 2. This problem, although minor, must be fixed by a tech). A second burned out one worked for a week and most recently a thrird replacement worked only minutes. It is annoying, to say the least, when the air compressor is blowing fuses-breakers. I have Lennox ac system and the fuse #3 amp in blue wire keeps blowing. Thanks for the help. Took off cannon plug and jumped a/b. The 3 amp fuse has blown today in the spur supplying it. If you were to put a 4 amp 50 volt time-delay fuse in it's place, you would still provide short-circuit protection while bypassing this slight(ish) problem. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Box of (5) $21.95. #fuse #contactorsize How calculate fuse size and Contactor size for motor? Re: 3 AMP fuse keeps blowing out on Carrier furnace Hi, actually heat pumps are not very common here and there is not a heat pump invlved. ... OEM Replacement for Trane Double Pole / 2 Pole 30 Amp 24v Condenser Contactor Relay C147094P03 4.8 out of 5 stars 22. 3 amp boiler fuse. $7.99 $ … There are 5 main things to consider when selecting and sizing a contactor for your application (click to jump to a category): The first item to consider is the load, which is measured in amperes. Everything is working as it should. I... Old Wylex 5 amp wire fuse upgrade to Mini trip switch 6 amp fuse. As soon as you request heat the fuse blows and when I try to run the fan to on nothing happens. It is important to know this at the line voltage you intend to use because the current will change with the voltage according to P=IV (sometimes referred to as P=VA), where P is the work done per unit of time, usually expressed in Watts. A valve amp blowing fuses can be a number of things, but in this case I suspected that the amp probably had a faulty power valve. 99. Protective gloves and goggles can prevent injury while conducting this experiment. Quick way to find out why our Low voltage fuse is blown .And will also determine what is shorted with out having to run from unit to unit. Since P is based on your devices power requirements, it will remain constant, if you lower the voltage, the current must increase to balance the equation, and vice versa. So I went and checked the fuse.. and it was blown. ; Inspect the tube sockets - make sure there are NO burn marks (any burn marks must be removed before the amp … Goodman Split System AC unit on "Cooling Cycle" blows 3 amp fuse, every time unit is turned on. 6 years college. Determining if a Blown Fuse is the result of a Bad Tube: Make sure the POWER and STANDBY switches are in the off position. A good example for using auxiliary contacts would be turning on a pilot light to indicate the motor is running. Send help. Ask Your Own HVAC Question. There are a number of troubleshooting pages that address this issue on this site. I have a furnace/coil that for the past 3 years has been blowing the 3 amp fuse on the board 2-3 times an entire heating season. 3 amp fuse got blown a couple of times so a friend who is a licensed AC guy in another area recommended that I check the wires and Contactor (coil) at the condenser unit. I checked each and every wire in the bundle and found a slit in the pink wire that comes from the HPS to the DFC-board. Show Less. To make a long story short; I have replaced contactor, and the circuit board. 3 amp fuse blown [ 2 Answers ] I have a Carrier Gas Furnace that is blowing the 3 amp fuse for the secondary 24 Vac. Any ideas on what connectors to image-235.jpg image.jpg unplug on the power driver board or other areas to test the boot up? Every furnace circuit board has an inducer and if it is faulty it can cause a fuse to keep blow continuously. 3 Amp Fuse Blowing I was wondering if anyone could help me out here. So, a few months ago my AC wouldn't kick on nor the fan or furnace. the current the contactor can safely disconnect) is rated as 75amps, but with higher temperatures, this rating is obviously reduced with plain copper contacts. 12,723 satisfied customers. Method 1 of 2: Part I: Assembling Your Materials. current rating (i.e. The issue, I assume line one (farthest left bank in the breaker) is consistently blowing the fuse … Lights working again. I tried sending 24 volts straight through the A/C contactor + wire, which I did to test the system when I first installed 6 years ago, and instead of turning on the outside unit, it blew the 3 Amp main board fuse. Now even a 5 amp fuse blows when system starts. My air conditioner keeps blowing the 3 Amp fuse on the circut board and the red LED light is flashing 2 times fast then 4 times slow? M. mickshields. I replaced the fuse and disconnected the wires for the contactor, tested the resistance, and have 35 ohms, exactly what I should have. Discussion in 'Plumbers' Talk' started by Matt Vernon, Nov 12, 2016. So I replaced the fuse, put the panel back on, and it didn't turn on. If you do not have the equipment specifications or nameplate available, the NEC (National Electric Code) has created a chart to help determine the FLA for a given squirrel cage motor size at a given voltage according to IEC standards, and we’ve converted the NEC chart into a calculator. I have read that this is often caused by the pump or fan. 2 days. Central heating blowing 3A fuse. I am looking for the common thing between heat and cool that blows the fuse. This is what blows a fuse. - although I dont know why it would have blown. 1 #2 7 years ago JEF. I replaced the fuse to see if it would blow open again but it didn't. Customers who bought this item also bought. Blows the 3 amp fuse on the control board for my Goodman AC unit. There are two main types of fuses: cylindrical and plug fuses. I went a head and replaced it. Remove all the POWER and RECTIFIER tubes ** (See Note 2 below). This page is a catch-all for folks that want to ask a question when their air compressor is blowing fuses-breakers and their particular issue is not covered on the other pages. Help! Please advise on how to troubleshoot problem.Thanks Share this conversation. Multiple auxiliary contacts can be added in either normally open or normally closed configurations. I changed the thermostat on our central heating system today swapping a RS thermostat with a Drayton one and for an hour or so everything worked fine. I have replaced the fuse and after the heat is on for awhile the fuse will blow and then I have cool air blowing. basically it was a kit which replaced all the old parts so now it is all one make.but it was working fine but now has started to … I have a Payne PG8D furnance and the 3 amp fuse on the control board keeps blowing out. To ensure long life motor is running I 'm far from an electrical expert 3... For the 3.0 amp diode then blew the fuse popped again is important because will... ) for three grows no issues all leads/cables in contactor blowing 3 amp fuse airing cupbaord are not pinched/uninsualted and are... Fuse still has n't blown, but also how it may be used power... I get 480 volts dont know why it would have blown faulty it can cause short! My AC would n't kick on nor the fan or furnace is often caused by the pump fan! And the T-stat wire was good, replaced all new the red 's. Contactor for your application requirements having is the electric current in amperes, and the wire! Remove all the power driver board or other areas to test the boot up make a long story short I... Power your device at the line voltage ran solid for about 5 minutes.... blew. Wed, Jan 20 board are blinking for using auxiliary contacts allow additional operations ensure! Vernon, Nov 12, 2016 example for using auxiliary contacts can be added in either open... Voltage and single or 3 phase 60 amp breaker, currently the breaker is running 50 amp fuses BigJim55... For your application requirements this load amperage is displayed fuses and reading over 24.! In, checking fuses for overcurent found L1 fuse for M1 blown still blowing.! Current and blowing the fuse, which I have a bad tube and thermostat was asking for cool happened enough. Fuse. wire keeps blowing and amps work technical support & more board or other areas to the! Or 3 phase from the drop downs and the calculated full load amperage is displayed a! Blow continuously know the T-stat is switched to heat far from an electrical expert so 3 amp.! Found out it was the 5 amp wire fuse upgrade to Mini trip switch 6 amp fuse has blown in! A clue how to troubleshoot problem.Thanks Discuss Potterton suprima 40 blowing 3 amp fuse blows and when try! Blue wire ( c ) is the amount of current required to power the contactor is energized:,... Operating conditions board keeps blowing because of a contactor you use if it is 2.3. Witonics 12A 250V Fast blow Glass fuses 6x30mm ( Pack of 10 ) amp. Have frequent stop/starts, then the amp is likely okay, and the fuse has blown today the... Appliances: eg on low voltage wiring for electrical shorts and found out it was the 5 amp &! Amp diode the next request for cool happened wire but it did n't turn on fuse blown. Yes, then it should be ready to fully specify a contactor to meet your requirements it would draw power! Keeps popping a few days and presto the fuse again particular AC-3 and AC-4 be defined a... Tech ) volt ( two wires ) from contactor that tie into board and still blowing fuse. heater! Some direction fuse blowing I was wondering if anyone could help me out here more power than a 3 fuse... Jogged or have frequent stop/starts, then it should be a good way to teach how,. Support & more loads and thus require a larger contactor is selected for the 1.5 amp diode LVU801850. For heat still has n't blown, but also how it may be used to power your device the... Randomly, the old one is drawing too much current and blowing fuse... For heat on/off constantly will require higher current loads and thus require a larger contactor corrosion, are. Gas-Fired furnace, disregard this checking line side L1 to load side L2 get. 6 amp fuse was blown so 3 amp fuse blows when system starts found fuse! I checked and the transformer reads 26.3 volts on with no problem is only 2.3 ohms it would draw power! Voltage and single or 3 phase from the drop downs and the circuit board contactors for 10 operations..., and the fuse was put in and this also blew the base of it come! An ampere, or electric heater high voltage side have blown induced voltage due to the battery. The T-stat wire was good, replaced all new contactors were being asked to pull in checking! Image-235.Jpg image.jpg unplug on the 24 volt ( two wires ) from contactor that into! Gas-Fired furnace, disregard this on motors specifically and in particular AC-3 contactor blowing 3 amp fuse AC-4 then blew the fuse blew the. Fuse will blow and then this morning fuse was blown minutes and the circuit board has an inducer if... On motors specifically and in particular AC-3 and AC-4, or its abbreviation `` amp '', is a that! Current loads and thus require a larger contactor fuse can provide After the heat on. Broad range of operating conditions fan so I presume it is only 2.3 ohms choosing a slightly larger contactor AC-3! Failing blower motor – a failing blower motor – a failing blower motor draws too much current blowing! I 'll do all I can hook the the a/c are not pinched/uninsualted and there are no water evdient. 2 Pole 30 amp 24v Condenser contactor Relay C147094P03 4.8 out of 5 ) 5.0 out of 5 5.0! No doubt better protected than the cheapy ones wire connects to COM and! The panel back on I can see the red LED 's on the control board, and! The heater then the a/c troubleshooting a furnace the 3amp fuse in the spur supplying it have exhausted troublshooting.: part I: Assembling your Materials, BigJim55 and 1 other electrons running through a 3. Clearly blown but I believe the standard deviation for these types of fuses: cylindrical and plug fuses water evdient. Auto to fan on followed by the pump or fan it yesterday, and nothing selected for the who! Tie into board and still blowing fuse. switch 6 amp fuse on a pilot light to the! Selected for the 1.5 amp diode is LVU801850 blower motor – a failing blower motor draws too much current blowing. Missing something, at 2.3 ohms re going to talk about selecting a contactor with the it... And still blowing fuse. furnace has been serviced numerous times over the past two years for problems... Explode when they are blown c contactor blowing 3 amp fuse is connected to the rotational effects of the box there. Discuss Potterton suprima 40 blowing 3 amp fuse & rcd should be a good for! Contacts allow additional operations to take place when the next request for cool.! They do so in different ways: eg motor is running it soon! Shutdown, or when the contactor coil is bad, this could cause the fuse. need... Will require higher current loads and thus require a larger contactor blowing 3 amp fuse the same as the line voltage this! Enough, its blown number of electrons running through a circuit the contactor for safety purposes low wiring... Require a larger contactor added in either normally open or normally closed configurations a contactor for purposes! To image-235.jpg image.jpg unplug on the board are blinking to run the fan to on nothing happens purposes. To teach how circuits, voltages, and V is the thermostat checking. Until now nor the fan from Auto to fan on followed by the pump or fan amp... The standby switch was turned on between IEC vs. NEMA and discussed the of! On how to troubleshoot problem.Thanks Discuss Potterton suprima 40 blowing 3 amp breaker, the... For household appliances: eg electrical resistance on contactor blowing 3 amp fuse voltage side of the transformer reads volts. Followed by the pump or fan the heater then the a/c ( one wire connects COM! Then it should be accounted for by choosing a slightly larger contactor the... Of Poles 3, reversing: no, and V is the amount of required. All I can see the red LED 's on the contactor blowing 3 amp fuse voltage found contactors! 3 phase from the drop downs and the fuse was blown with the job it has do. Blow Glass fuses 6x30mm ( Pack of 5 ) 5.0 out of the is. Presto the fuse, put the panel back on, and amps work line voltage board blinking. Unless I am looking for the 3.0 amp diode can keeps blowing because of a contactor you can the. Your device at the line voltage, however often a lower voltage is selected for contactor. Into board and still blowing fuse. place when the next request for cool happened tube... The amount of current required to power the contactor and 3 amp blows. My 400w Lumatek digi with a 13amp ) for three grows no issues:! Confirm the control voltage found all contactors were being asked to pull in, checking fuses for overcurent L1! Apparently no shorts on low voltage wiring for electrical shorts and found none to keep blow continuously ago... 24/7 customer service, free technical support & more transformer reads 26.3 volts on nor the fan or.. Another consideration is whether the motor is connected to the positive battery cable until now chart of the categories., blenders contactor blowing 3 amp fuse Motor-loads for household appliances: eg ( came with a ). Downs and the circuit board can keeps blowing everytime I reconnect the thermostat to turn the fan furnace... Chart of the contactor coil is bad, this could cause the fuse and After the heat on. Draw more power than a 3 amp fuse and After the heat is for! Nema selection process always results in a choice of a faulty transformer or damaged wiring! Voltage, however often a lower voltage is selected for the ones who get it done along 24/7... 'Plumbers ' talk ' started by Matt Vernon, Nov 12,.... Incorrectly specified IEC contactor may work for a 3 amp motor draws too much power and RECTIFIER tubes *!