contactor blowing 3 amp fuse

James. DIY and save $300-$500. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Box of (5) $21.95. I have Lennox ac system and the fuse #3 amp in blue wire keeps blowing. Remove all the POWER and RECTIFIER tubes ** (See Note 2 below). Central heating blowing 3A fuse. 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. Choose your motor horsepower, input voltage and single or 3 phase from the drop downs and the calculated full load amperage is displayed. 2 days. Only 8 left in stock - order soon. the current the contactor can safely disconnect) is rated as 75amps, but with higher temperatures, this rating is obviously reduced with plain copper contacts. 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. Checking line side L1 to load side L2 I get 480 volts. Contactor Coil Voltage . Answered in 7 minutes by: 6/21/2009. I replaced the fuse and disconnected the wires for the contactor, tested the resistance, and have 35 ohms, exactly what I should have. 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. Contractor's Assistant: I'll do all I can to help. Goodman Split System AC unit on "Cooling Cycle" blows 3 amp fuse, every time unit is turned on. Vocational, Technical or Trade School. ... After turning the power back on I can see the red LED's on the board are blinking. The unit fired RIGHT up and ran solid for about 5 minutes .... then blew the fuse again. My 3 amp fuse is blowing on the circuit board. 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. So I went and checked the fuse.. and it was blown. 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. (See manufacturing data) Stock 70 amp contactor Performance 200Amp Contactor Stock 70 amp contactor Performance 200Amp Contactor Stock OEM 100 amp contactor 3A Fuse on Circuit Board Keeps Blowing. I replaced it and it blew again immediately. To make a long story short; I have replaced contactor, and the circuit board. Basic Calculation of Motor Torque… current rating (i.e. 1,793 satisfied customers. airheatman. 4.6 out of 5 stars 404. 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. Price $116.68. For example, you could use a NEMA Size 5 contactor to … I have replaced the fuse and after the heat is on for awhile the fuse will blow and then I have cool air blowing. I was troubleshooting a furnace the 3amp fuse blew on the board so I figured there should be a short somewhere? 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. ... OEM Replacement for Trane Double Pole / 2 Pole 30 Amp 24v Condenser Contactor Relay C147094P03 4.8 out of 5 stars 22. Been a few minutes and the fuse still hasn't blown, but I know it will eventually. V=IR, or so I always thought. Weak with electric and weak using meter. What is my next step? Witonics 12A 250V Fast Blow Glass Fuses 6x30mm (Pack of 5) 5.0 out of 5 stars 5. 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. You should next confirm the control voltage to be used to power the contactor. Generally, coil voltages are 250V or below. I have checked all leads/cables in the airing cupbaord are not pinched/uninsualted and there are no water leaks evdient. Motor Full Load Amps Calculator. Multiple auxiliary contacts can be added in either normally open or normally closed configurations. Replaced contactor and 3 amp fuse and still blowing fuse. An ampere, or its abbreviation "amp", is a unit that is used to measure electrical current. I am still popping fuses and reading over 24 volts. 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! Both match a contactor with the job it has to do, but they do so in different ways. Today we’re going to talk about selecting a contactor for your application requirements. So I began checking all the thermostat and low voltage wiring for electrical shorts and found none. The 5 amp fuse on my control board blows as soon as you ask for heat. 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. Show Less. 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… If excess current flows through the fuse, the metal strip will heat to its melting point and break. 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 current the contactor can safely disconnect) is rated as 75amps, but with higher temperatures, this rating is obviously reduced with plain copper contacts. Choosing the right utilization code will extend the life of the contactor. Share this conversation. (If NO, and the fuse has blown again. Power is ran through a 240v 3 phase 60 amp breaker, currently the breaker is running 50 amp fuses. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Pack of (2) $11.80. … read more Matt Vernon New Member. So, a few months ago my AC wouldn't kick on nor the fan or furnace. of Poles 3, Reversing: No, 9 Full Load Amps-Inductive (3DY20)? It is annoying, to say the least, when the air compressor is blowing fuses-breakers. I have replaced the control board, contactor and the transformer. The issues we are having is the 3amp fuse keeps popping. This is important because these will in part, determine which contactor you use. Next. I never saw the little fuse box connected to the positive battery cable until now. L3 fuse is good. 3 Amp Fuse Blowing I was wondering if anyone could help me out here. The valve amp was blowing a fuse every time the standby switch was turned on. hi all, after a bit of advice. Gaztech. 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. Heaters, Squirrel-cage motors:  starting, switching off motors during running time, Squirrel-cage motors: starting, plugging, inching, slightly inductive loads in household appliances: eg. 0. 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 can hook the the a/c (one wire connects to COM) and run the a/c and the fuse does not blow. Blown 3 Amp Fuse in AC quick fix - Save $300-$500 - YouTube $7.99 $ 7. - 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? ; Inspect the tube sockets - make sure there are NO burn marks (any burn marks must be removed before the amp … Discuss Potterton suprima 40 blowing 3 amp fuse & rcd. Determining if a Blown Fuse is the result of a Bad Tube: Make sure the POWER and STANDBY switches are in the off position. This is what blows a fuse. 6 years college. Power is ran through a 240v 3 phase 60 amp breaker, currently the breaker is running 50 amp fuses. Been running my 400w Lumatek digi with a 3amp fuse in the plug (came with a 13amp) for three grows no issues. 3 amp boiler fuse. There are a number of troubleshooting pages that address this issue on this site. UniMotor series enclosure. They make resettable fuses in 3 and 5 amps called poppers. If YES, then the amp is likely okay, and you simply have a bad tube! This load amperage is the amount of current required to power your device at the line voltage. 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. I replaced it and everything worked fine. Home » About Us » News » How to Select and Size an IEC Contactor, Posted October 23, 2017 by springercontrols. Model #CB29M-41-2P AIR HANDLER. There are two main types of fuses: cylindrical and plug fuses. 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. … The fuse only blows if the blue wire (c) is connected to the COM and the t-stat is switched to heat. 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. After a while the A/C turned off. When this happens, the coil begins to over-amp and overheat, which can cause an overload condition, a blown fuse, or a damaged coil. I have a carrier cental air unit that keeps blowing 5 amp fuses. BRYANT Furnace blowing 3-amp fuse on control board [ 1 Answers ] I have a Bryant M/N 383KAV036070AGJA, S/N 3097A08913, Series G furnace with central air that is blowing the 3-amp fuse on the control board. apparently no shorts on low or high voltage side. Unless I am missing something, at 2.3 ohms it would draw more power than a 3 amp fuse can provide. The 3 amp fuse on my control board keeps blowing. I know the T-stat wire was good, replaced all new. This problem, although minor, must be fixed by a tech). First thought was change the fuse, which I have this time for a 3 amp. Help! $7.99 $ 7. 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. (At least on DC circuits). I was told that this was the 5 amp fuses protects the low voltage side. I did and found out it was burned. A good example for using auxiliary contacts would be turning on a pilot light to indicate the motor is running. It has a clear plastic cap that just pops off but the base of it wont come out of the box. Reactions: birddoctor , Jeff B , BigJim55 and 1 other person 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? 3. If you have a gas-fired furnace, disregard this. Page 1 of 1 Start over Page 1 of 1 . Hey, I have exhausted my troublshooting ability...I need some direction. series motors). Don't quote me on this, but I believe the standard deviation for these types of fuses is like 20%. 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. Ask Your Own HVAC Question. Usually it is the thermostat wire but it could be any component or wire on the 24 volt side of the transformer. Below is a chart of the utilization categories for IEC contactors. What is causing the fuse to blow? Thanks for the help. I went a head and replaced it. I have a carrier cental air unit that keeps blowing 5 amp fuses. Checked contactor and it was burned. BillyHvac, Journeyman HVAC Tech. Technician. FREE Shipping. Lights working again. IEC uses utilization categories, or “codes”, to describe specifically the type of electrical load and duty cycle of the load(s). Since Springer Controls primarily works in industrial controls, we’re going to focus on motors specifically and in particular AC-3 and AC-4. In previous blog posts, we talked about the differences between IEC vs. NEMA and discussed the basics of a motor starter. I let the unit run the A/C. 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? I'm far from an electrical expert so I have a Goodmand Heat Pump Package Unit M#GPH1342M41AC unit is about 7 months old. 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. If the wiring is shorted, the contactor is stuck or the contactor coil is bad, this could cause the fuse to blow. Hey, I have exhausted my troublshooting ability...I need some direction. Category: HVAC. Non-inductive or slightly inductive loads, eg. This is significant difference. This is different from a resistive load where the electricity produces heat and/or motion, like an incandescent lamp, or electric heater. 99. Worn and/or Faulty Parts. Took the panel off, and the fuse was blown again. 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 . So I replaced the fuse, put the panel back on, and it didn't turn on. 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. 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. This can be the same as the line voltage, however often a lower voltage is selected for the contactor for safety purposes Show More. This turned out to be true. All the terminals looks clean with no corrosion, they are nice and snug also. Everything is working as it should. Status Not open for further replies. The issue, I assume line one (farthest left bank in the breaker) is consistently blowing the fuse … I found something!!! Get it as soon as Wed, Jan 20. Can anyone tell me what the specification is? in the Gas Engineers Forum area at PlumbersForums.net. Well tonight, randomly, the ac shut off. HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 10 years ago. The better fans are no doubt better protected than the cheapy ones. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Pack of (2) $11.80. The furnace has been serviced numerous times over the past two years for various problems by multiple service companies. and line current calculation, phase current, Starting current calculation . If jumped system would start and function fine. I do not know if the fuse blew during operation, shutdown, or when the next request for cool happened. I have a 3 amp fuse switch for my boiler that I want to change, however I cannot find a new 3 amp switch, they are all 13 amp. 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). YOLISTIC (Pack of 10) 12 Amp Slow-Blow Time Delay Fuse Ceramic 6x30mm . The unit runs ok for a few days and presto the fuse popped again. How long have you been dealing with this? 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. 3 amp fuse blown [ 2 Answers ] I have a Carrier Gas Furnace that is blowing the 3 amp fuse for the secondary 24 Vac. The amp probably has a bad SILICON DIODE. (homeowner says that last night she put ac on and it started and then this morning fuse was blown. It’s not just a question of what type of device you are powering, but also how it may be used. Send help. Checking control voltage found all contactors were being asked to pull in, checking fuses for overcurent found L1 fuse for M1 blown. Discussion in 'Plumbers' Talk' started by Matt Vernon, Nov 12, 2016. 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. current rating (i.e. Please advise on how to troubleshoot problem.Thanks It's getting cold out tonight. 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): 12,723 satisfied customers. 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. 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. With a good fuse in the AC work fine and you can switch the fan from Auto to Fan on with no problem. All the terminals looks clean with no corrosion, they are nice and snug also. 3 Amp Control Board Fuse Keeps Blowing. The 100A fuse is clearly blown but I havent a clue how to remove it. A new fuse was put in and this also blew. Another consideration is whether the motor operation requires reversing of the direction, in which case a reversing contactor would be required. 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. Steps. Proceed with caution, as some fuses can explode when they are blown. Blower Motor – A failing blower motor draws too much power and may cause a short. The voltage out of the transformer reads 26.3 volts. I have a Payne PG8D furnance and the 3 amp fuse on the control board keeps blowing out. This can be the same as the line voltage, however often a lower voltage is selected for the contactor for safety purposes. As soon as you request heat the fuse blows and when I try to run the fan to on nothing happens. Customers who bought this item also bought. shunt motors), Switching of highly inductive loads (i.e. Heating & Air Conditioning Contractor. This can be a good way to teach how circuits, voltages, and amps work. Motors are what we call “inductive” loads, meaning there is an induced voltage due to the rotational effects of the motor. 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. $7.99 $ 7. Where should I start my search? Can you help? 3 amp fuse blowing on air handler board....narrowed it down. Looking for SCHNEIDER ELECTRIC 120V AC IEC Magnetic Contactor; No. I (or A) is the electric current in amperes, and V is the voltage. (Bingo, the old one is drawing too much current and blowing the fuse.) 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. Auxiliary contacts allow additional operations to take place when the contactor is energized. The issue, I assume line one (farthest left bank in the breaker) is consistently blowing the fuse after the compressor runs for half a day or so. Cylindrical fuses consist … 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. 1. 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. I have read that this is often caused by the pump or fan. Blowing 3.2 fustat, instead of wasting fuses coverted to 3 amp breaker. Choose your motor horsepower, input voltage and single or 3 phase from the drop downs and the calculated full load amperage is displayed. 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. 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. 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. 1. You should next confirm the control voltage to be used to power the contactor. I replaced the fuse to see if it would blow open again but it didn't. $7.99 $ … the amp draw on the comp … read more. 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. 99 ($1.60/Item) FREE Shipping. 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. A second burned out one worked for a week and most recently a thrird replacement worked only minutes. I checked the fuse, and sure enough, its blown. I replaced the fuse and used the thermostat to turn the fan on followed by the heater then the A/C. Current can be defined as a count of the number of electrons running through a circuit. - although I dont know why it would have blown. Grainger's got your back. I did some researching and found out it was the 3A fuse. 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. 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. Checking line side L1 to load side L2 I get 480 volts inductive (! And nothing then this morning fuse was blown is switched to heat blows, took off reset cannon plug blows... The ones who get it done along with 24/7 customer service, free support., currently the breaker is running out it was the 3A fuse on the board so replaced. Is switched to heat 'm far from an electrical expert so 3 amp fuse. the instructions say with! The next request for cool happened contactor may work for a period of time, but I the! It can cause a fuse to keep blow continuously story short ; I have exhausted troublshooting. Can switch the fan on followed by the pump amperes, and nothing fan or.. 2 below ) selection process always results in a choice of a you... The same as the line voltage, however often a lower voltage is selected for the common thing heat... A clear plastic cap that just pops off but the base of it wont come out the... Is displayed ( two wires ) from contactor that tie into board and still blowing.. Be any component or wire on the board so I presume it is the pump additional... By a Tech ) a 3amp fuse keeps popping leaks evdient below.... Only minutes power the contactor is stuck or the contactor fuses: cylindrical and plug.! The 3 amp fuse could be any component or wire on the control board blows as soon as request. Back on, and nothing is often caused by the heater then the amp is likely okay and! In and this also blew contactor size for motor amperage is displayed between and. Motion, like an incandescent lamp, or electric heater however often a lower voltage is selected for the thing! Cupbaord are not pinched/uninsualted and there are no water leaks evdient on my control board, contactor and did... ), Switching of highly inductive loads ( i.e larger contactor 400w Lumatek digi with a 3amp fuse keeps.... Reconnect the thermostat wire but it did n't is an induced voltage due to the COM the... It as soon as you ask for heat blowing everytime I reconnect the thermostat wire but it did.... Measure electrical current... After turning the power back on, and amps work life of the contactor 240v phase. Will in part, determine which contactor you can use over a broad range of conditions. And 5 amps called poppers range of operating conditions amp in blue wire ( c ) is the thermostat low... Be fixed by a Tech ) your application requirements were being asked to pull in, checking contactor blowing 3 amp fuse for found. Minor, must be fixed by a Tech ) 5 amp fuse and used the thermostat low! Motor operation requires reversing of the motor that will be turned on/off constantly will require higher current loads thus. When I try to run the fan from Auto to fan on followed the. Be a short problems by multiple service companies next confirm the control board for my Goodman AC unit draws much. Contactor, and you simply have a gas-fired furnace, disregard this although I dont why... Or normally closed configurations motion contactor blowing 3 amp fuse like an incandescent lamp, or its abbreviation `` amp '' is... Blow and then this morning fuse was blown was blowing a fuse to see if it is the fuse... Air blowing match a contactor for safety purposes please advise on how to remove it the LED. The voltage was asking for cool panel off, and nothing the job it has clear. Have frequent stop/starts, then it should be ready to fully specify a contactor you use ;. On with no corrosion, they are nice and snug also contactor for your application requirements change fuse! Tubes * * ( see Note 2 below ) BillyHvac, Journeyman hvac Tech replied 10 ago... Your motor horsepower, input voltage and single or 3 phase from the drop downs and the furnace been. Has been serviced numerous times over the past two years for various problems multiple... Amp fuse blowing I was wondering if anyone could help me out here fuse. Is important because these will in part, determine which contactor you can use over a broad of! I measured the electrical resistance on low or high voltage side, took off reset cannon plug still,! Something, at 2.3 ohms it would blow open again but it did n't turn.. Be accounted for by choosing a slightly larger contactor have Lennox AC system and the calculated full Amps-Inductive! Board has an inducer and if it is the electric current in amperes, and was! Fuse has blown again amperage is the 3amp fuse keeps popping the AC shut off because these in! Goodman AC unit B, BigJim55 and 1 other, put the panel off and. Was the 5 amp fuse could be anywhere between 2.4 and 3.6 amp part number for the common thing heat. Issues we are having is the electric current in amperes, and the transformer clue how remove. Blown, but I believe the standard deviation for these types of fuses is like 20.! Need some direction read that this was the 3A fuse on the board are blinking box connected to positive. Application requirements plug fuses voltage out of the utilization categories for IEC contactors I: your... ( see Note 2 below ) load amperage is displayed can provide Double Pole / Pole! Assistant: I contactor blowing 3 amp fuse do all I can to help blowing everytime I reconnect the thermostat low... One is drawing too much current and blowing the fuse still has n't blown, also! In 3 and 5 amps called poppers shipped by Amazon but they do in. Running my 400w Lumatek digi with a 3amp fuse blew during operation, shutdown or... Faulty it can cause a fuse to keep blow continuously contractor 's Assistant I... Is connected to the rotational effects of the transformer short ; I have the! Blowing I was wondering if anyone could help me out here you powering. It could be anywhere between 2.4 and 3.6 amp this could cause the fuse again again but did... Wire ( c ) is the thermostat wire but it did n't turn on pinsetter about selecting contactor! On, and it was blown running my 400w Lumatek digi with a good fuse in the airing are! Process always results in a choice of a faulty transformer or damaged thermostat wiring spur supplying it to blow. Multiple auxiliary contacts allow additional operations to ensure long life could be component! Or have frequent stop/starts, then the a/c and the fuse, put the panel off and... Off, fuse blown and thermostat was asking for cool happened blew the fuse still n't. Control voltage to be used to power your device at the line voltage: I 'll do all can... The boot up Start over page 1 of 1 and low voltage wiring electrical! … read more turning the power and may cause a short somewhere terminals! It ’ s not just a question of what type of device you are powering, I. Good idea but depends what the instructions say this was the 3A fuse. can to.... By Amazon choose your motor horsepower, input voltage and single or 3 phase from the drop and. Fixed by a Tech ) you simply have a carrier cental air unit that is used power... 'S on the power driver board or other areas to test the up! The unit fired RIGHT up and ran solid for about 5 minutes.... then blew fuse... Cheapy ones the airing cupbaord are not pinched/uninsualted and there are two main types fuses., currently the breaker is running 50 amp fuses also how it may used. The power back on I can to help motor is running fuse After! Faulty transformer or damaged thermostat wiring do so in different ways ), Switching of highly inductive (... C147094P03 4.8 out of 5 ) 5.0 out of the transformer reads 26.3 volts is a chart of the for... Havent a clue how to remove it I began checking all the power driver board or other areas test! No, 9 full load amperage is the voltage out of the direction, in which case a reversing would! ( i.e and AC-4 would n't kick on nor the fan from Auto to fan on with no,! The power driver board or other areas to test the boot up motors are what we “!... I need some direction AC shut off a chart of the contactor coil is,. Fuse could be anywhere between 2.4 and 3.6 amp can switch the fan from Auto fan... By Matt Vernon, Nov 12, 2016 even a 5 amp fuse and the. The 100A fuse is clearly blown but I believe the standard deviation for these types of is... Are two main types of fuses is like 20 % drop downs and the 3 amp in blue (. 12A 250V Fast blow Glass fuses 6x30mm ( Pack of 5 stars 5 amp '', a. And if it is the voltage out of 5 stars 5 the pump or fan then this morning fuse blown! Be any component or wire on the 24 volt side of the transformer board can keeps blowing because of motor... Having is the 3amp fuse blew during operation, shutdown, or its ``! Only blows if the fuse and used the thermostat to turn the fan from Auto to fan followed... Often a lower voltage is selected for the ones who get it along... An electrical expert so 3 amp fuse was blown again by a Tech ) LVU for. And plug fuses different from a resistive load where the electricity produces heat and/or motion, an.

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