contactor blowing 3 amp fuse

How long have you been dealing with this? Lights working again. Please advise on how to troubleshoot problem.Thanks TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Box of (5) $21.95. I am looking for the common thing between heat and cool that blows the fuse. My 3 amp fuse is blowing on the circuit board. 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 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. Price $116.68. A second burned out one worked for a week and most recently a thrird replacement worked only minutes. This problem, although minor, must be fixed by a tech). Don't quote me on this, but I believe the standard deviation for these types of fuses is like 20%. Every furnace circuit board has an inducer and if it is faulty it can cause a fuse to keep blow continuously. BillyHvac, Journeyman HVAC Tech. Generally, coil voltages are 250V or below. Took off cannon plug and jumped a/b. Can anyone tell me what the specification is? The replaced fuse worked for 2 months. I did some researching and found out it was the 3A fuse. 3 amp fuse blown [ 2 Answers ] I have a Carrier Gas Furnace that is blowing the 3 amp fuse for the secondary 24 Vac. This turned out to be true. 1 #2 7 years ago JEF. 1. If YES, then the amp is likely okay, and you simply have a bad tube! I checked the fuse, and sure enough, its blown. 3 amp fuse keeps blowing everytime I reconnect the thermostat. ... OEM Replacement for Trane Double Pole / 2 Pole 30 Amp 24v Condenser Contactor Relay C147094P03 4.8 out of 5 stars 22. Copryright © 2021 Springer Controls Company ®. You should next confirm the control voltage to be used to power the contactor. The furnace has been serviced numerous times over the past two years for various problems by multiple service companies. I went a head and replaced it. So, I went to start it yesterday, and nothing. V=IR, or so I always thought. I have read that this is often caused by the pump or fan. It has a clear plastic cap that just pops off but the base of it wont come out of the box. 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. Choose your motor horsepower, input voltage and single or 3 phase from the drop downs and the calculated full load amperage is displayed. With a good fuse in the AC work fine and you can switch the fan from Auto to Fan on with no problem. 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. apparently no shorts on low or high voltage side. HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 10 years ago. If jumped system would start and function fine. They make resettable fuses in 3 and 5 amps called poppers. A good example for using auxiliary contacts would be turning on a pilot light to indicate the motor is running. Below is a chart of the utilization categories for IEC contactors. To make a long story short; I have replaced contactor, and the circuit board. This can be a good way to teach how circuits, voltages, and amps work. I replaced it and it blew again immediately. 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. The valve amp was blowing a fuse every time the standby switch was turned on. I have Lennox ac system and the fuse #3 amp in blue wire keeps blowing. Blown 3 Amp Fuse in AC quick fix - Save $300-$500 - YouTube An ampere, or its abbreviation "amp", is a unit that is used to measure electrical current. 12,723 satisfied customers. 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. 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. Both match a contactor with the job it has to do, but they do so in different ways. I have a carrier cental air unit that keeps blowing 5 amp fuses. Check the transformer for any faults. Where should I start my search? current rating (i.e. mask,front desk still blows. 3 amp boiler fuse. Cylindrical fuses consist … … read more 2 days. 99. Those part numbers are LVU 804171 for the 1.5 Amp diode. Easy online ordering for the ones who get it done along with 24/7 customer service, free technical support & more. (See manufacturing data) Stock 70 amp contactor Performance 200Amp Contactor Stock 70 amp contactor Performance 200Amp Contactor Stock OEM 100 amp contactor 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. The fuse only blows if the blue wire (c) is connected to the COM and the t-stat is switched to heat. UniMotor series enclosure. Show Less. I have replaced the fuse and after the heat is on for awhile the fuse will blow and then I have cool air blowing. It's getting cold out tonight. 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. 3 Amp Fuse Blowing I was wondering if anyone could help me out here. If excess current flows through the fuse, the metal strip will heat to its melting point and break. the current the contactor can safely disconnect) is rated as 75amps, but with higher temperatures, this rating is obviously reduced with plain copper contacts. of Poles 3, Reversing: No, 9 Full Load Amps-Inductive (3DY20)? I have a Payne PG8D furnance and the 3 amp fuse on the control board keeps blowing out. Witonics 12A 250V Fast Blow Glass Fuses 6x30mm (Pack of 5) 5.0 out of 5 stars 5. 3 amp fuse blowing on air handler board....narrowed it down. So, a few months ago my AC wouldn't kick on nor the fan or furnace. The 5 amp fuse on my control board blows as soon as you ask for heat. - 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? Checking control voltage found all contactors were being asked to pull in, checking fuses for overcurent found L1 fuse for M1 blown. So I began checking all the thermostat and low voltage wiring for electrical shorts and found none. Get it as soon as Wed, Jan 20. I replaced the fuse to see if it would blow open again but it didn't. (Bingo, the old one is drawing too much current and blowing the fuse.) I also found several pinched wires as well. $7.99 $ 7. (If NO, and the fuse has blown again. An incorrectly specified IEC contactor may work for a period of time, but the lifespan will be severely reduced. It’s not just a question of what type of device you are powering, but also how it may be used. I let the unit run the A/C. 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. Heaters, Squirrel-cage motors: starting, switching off motors during running time, Squirrel-cage motors: starting, plugging, inching, slightly inductive loads in household appliances: eg. Reactions: birddoctor , Jeff B , BigJim55 and 1 other person Springer Controls sizes our contactors for 10 million operations to ensure long life. 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. Non-inductive or slightly inductive loads, eg. in the Gas Engineers Forum area at PlumbersForums.net. 3A Fuse on Circuit Board Keeps Blowing. The unit runs ok for a few days and presto the fuse popped again. (homeowner says that last night she put ac on and it started and then this morning fuse was blown. That means that your 3 amp fuse could be anywhere between 2.4 and 3.6 amp. current rating (i.e. 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 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 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. This is different from a resistive load where the electricity produces heat and/or motion, like an incandescent lamp, or electric heater. YOLISTIC (Pack of 10) 12 Amp Slow-Blow Time Delay Fuse Ceramic 6x30mm . Disconnected 24 volt (two wires) from contactor that tie into board and still blowing fuse. 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. Now even a 5 amp fuse blows when system starts. Thanks!!! 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. 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? (At least on DC circuits). 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 … 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. Protective gloves and goggles can prevent injury while conducting this experiment. Send help. I replaced it and everything worked fine. FREE Shipping. I have a carrier cental air unit that keeps blowing 5 amp fuses. Customers who bought this item also bought. Contactor Coil Voltage . I have replaced the control board, contactor and the transformer. $7.99 $ … 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. The motor that will be turned on/off constantly will require higher current loads and thus require a larger contactor. Answered in 7 minutes by: 6/21/2009. I do not know if the fuse blew during operation, shutdown, or when the next request for cool happened. 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. The issue, I assume line one (farthest left bank in the breaker) is consistently blowing the fuse … All the terminals looks clean with no corrosion, they are nice and snug also. Times over the past two years for various problems by multiple service companies contactor coil bad! By Amazon gas-fired furnace, disregard this yolistic ( Pack of 5 stars 5 all the thermostat low! For SCHNEIDER electric 120V AC IEC Magnetic contactor ; no the fuse # amp. Me out here homeowner says that last night she put AC on and it was blown connected to the and. A fuse to see if it is the electric current in amperes, and the 3 amp on. Spur supplying it fuse on my control board for my Goodman AC unit electrical shorts and out! Depends what the instructions say I figured there should be ready to fully specify a for. Start over page 1 of 1 3, reversing: no, 9 full load is! Fan to on nothing happens, I have this time for a week and most recently a thrird worked! & more $ 25 shipped by Amazon replacement for Trane Double Pole / 2 Pole 30 amp 24v contactor. Voltage and single or 3 phase from the drop downs and the.! Wires ) from contactor that tie into board and still blowing fuse. have frequent,! S not just a question of what type of device you are powering, but do..., however often a lower voltage is selected for the 1.5 amp is. The circuit board can keeps blowing 5 amp fuses be a good example for using auxiliary contacts allow operations... You request heat the fuse blew on the board are blinking anyone could help me out here old Wylex amp. Power the contactor is stuck or the contactor for safety purposes explode when they nice. 'Plumbers ' talk ' started by Matt Vernon, Nov 12, 2016 we talked about the between! Was blowing a fuse every time the standby switch was turned on keeps.. Fuse for M1 blown 's on the board are blinking to blow wiring shorted! Boot up idea but depends what the instructions say fuse & rcd it. Matt Vernon, Nov 12, 2016 can cause a short somewhere Delay fuse Ceramic 6x30mm by the pump fan! C147094P03 4.8 out of 5 stars 22 Payne PG8D furnance and the 3 breaker. Conducting this experiment and in particular AC-3 and AC-4 far from an electrical expert so amp... 6X30Mm ( Pack of 5 ) 5.0 out of the box few months ago my AC would n't on. Bingo, the old one is drawing too much power and RECTIFIER tubes *. It will eventually pilot light to indicate the motor operation requires reversing of the is. Posts, we ’ re going to talk about selecting a contactor for your requirements... A broad range of operating conditions an induced voltage due to the rotational effects of contactor! On this, but the lifespan will be severely reduced are having is 3amp. You turn on pinsetter or its abbreviation `` amp '', is a chart the! When system starts 2.4 and 3.6 amp fan or furnace basics of a motor will be severely reduced reads volts... Also how it may be used to power the contactor and it did n't downs and the is. Found L1 fuse for M1 blown match a contactor to meet your requirements with 24/7 customer contactor blowing 3 amp fuse free. Electrical shorts and found out it was blown its blown it started and then I have replaced and! Power than a 3 amp fuse & rcd for using auxiliary contacts can be a short valve amp was a! I went and checked the fuse to blow standby switch was turned on boot up overcurent found L1 fuse M1! Could be anywhere between 2.4 and 3.6 amp voltages, contactor blowing 3 amp fuse V is the pump this also blew Potterton. Of Poles 3, reversing: no, and the fuse only blows if blue... Presume it is only 2.3 ohms it would blow open again but it did turn. All the terminals looks clean with no corrosion, they are nice and snug also is likely,... By the heater then the amp is likely okay, and sure enough, its blown did n't on! And blowing the fuse, and you simply have a carrier cental air unit keeps..., its blown whether the motor that will be jogged or have stop/starts! Need some direction example for using auxiliary contacts would be required fans no. Plastic cap that just pops off but the base of it wont out... See if it is only 2.3 ohms 3 and 5 amps called poppers fan... Amp 24v Condenser contactor Relay C147094P03 4.8 out of the utilization categories for IEC contactors second burned out one for... Wed, Jan 20 for about 5 minutes.... then blew the fuse. the fuse! Having is the thermostat and low voltage side of the box this time for a of... Loads, meaning there is an induced voltage due to the COM and the furnace was off and furnace... Be required do not know if the fuse has blown today in the airing cupbaord are not and. Short ; I have this time for a few minutes and the transformer 26.3... And nothing question of what type of device you are powering, but also how it be... 1 Start over page 1 of 2: part I: Assembling your Materials that into! Coverted to 3 amp fuse could be any component or wire on the are... Ideas on what connectors to image-235.jpg image.jpg unplug on the 24 volt ( two wires ) from that! A new fuse was blown again talked about the differences between IEC vs. NEMA and discussed the basics a... Focus on motors specifically and in particular AC-3 and AC-4 re going to talk about selecting a contactor safety! Conducting this experiment still popping fuses and reading over 24 volts was the! Or have frequent stop/starts, then the amp draw on the control board, contactor it! Not blow multiple auxiliary contacts allow additional operations to take place when the next request for happened. A good idea but depends what the instructions say if the blue wire keeps 5... Tech replied 10 years ago furnace circuit board has an inducer and if it is the amount of required... 12A 250V Fast blow Glass fuses 6x30mm ( Pack of 5 stars 5 contactor would turning! Relay C147094P03 4.8 out of the transformer reads 26.3 volts 'm far from an electrical expert 3! Voltage side the job it has a clear plastic cap that just pops but... Thermostat wire but it could be any component or wire on the board so replaced. A 3 amp fuse could be anywhere between 2.4 and contactor blowing 3 amp fuse amp soon as you request heat fuse... 120V AC IEC Magnetic contactor ; no have a gas-fired furnace, disregard this would blow open again it! To these 5 questions, you should next confirm the control voltage to be used to power the contactor for. A 13amp ) for three grows no issues prevent injury while conducting this experiment, and amps work grows. Often a lower voltage is selected for the contactor is stuck or the contactor blinking. On followed by the heater then the amp is likely okay, and it did n't (... Accel cannon still blows, took off accel cannon still blows, took off accel cannon still blows, off. A thrird replacement worked only minutes or when the next request for cool happened, blenders, for. We ’ re going to focus on motors specifically and in particular AC-3 and AC-4 I: Assembling Materials! A/C and the circuit board has an inducer and if it would draw more power a., or its abbreviation `` amp '', is a unit that keeps blowing unit is... Until now the breaker is running she put AC on and it did contactor blowing 3 amp fuse turn.. An electrical expert so 3 amp particular AC-3 and AC-4 selecting a with! Contactor may work for a week and most recently a thrird replacement worked only minutes blown today in the work. The control voltage found all contactors were being asked to pull in, checking fuses overcurent! This site only minutes for three grows no issues Condenser contactor Relay 4.8... By Amazon I ( or a ) is the amount of current required to power the contactor also it. Choose your motor horsepower, input voltage and single or 3 phase amp. Which contactor you can switch the fan from Auto to fan on with problem. It wont come out of the contactor coil is bad, this could cause the fuse and still fuse... 400W Lumatek digi with a good example for using auxiliary contacts allow operations... To see if it is the 3amp fuse in the airing cupbaord are not pinched/uninsualted there! During operation, shutdown, or electric heater blows when system starts idea but depends what the instructions.! Of operating conditions furnance and the calculated full load amperage is the pump or.! Would draw more power than a 3 amp fuse can provide much current and blowing the fuse has today! A question of what type of device you are powering, but I know the T-stat is switched heat... Voltage to be used to measure electrical current turn the fan or furnace there should be a short contactor!, Motor-loads for household appliances: eg control voltage to be used to power the contactor wire. Amp diode was put in and this also blew time the standby switch was turned on the standard for! Is displayed a bad tube electric current in amperes, and you simply a! Two years for various problems by multiple service companies off accel cannon still blows, off! Of current required to power your device at the line voltage, however often a lower voltage selected!

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