I am still popping fuses and reading over 24 volts. TRANE Replacement Time Delay Fuse, Single Element, 300 VAC, 3.2 AMP, 24V Control - Pack of (2) $11.80. 99 ($1.60/Item) FREE Shipping. HVAC Technician: BillyHvac, Journeyman HVAC Tech replied 10 years ago. The 3 amp fuse on my control board keeps blowing. 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. 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! 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? Checking control voltage found all contactors were being asked to pull in, checking fuses for overcurent found L1 fuse for M1 blown. 12,723 satisfied customers. Home » About Us » News » How to Select and Size an IEC Contactor, Posted October 23, 2017 by springercontrols. 4.6 out of 5 stars 404. Page 1 of 1 Start over Page 1 of 1 . 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. 3 amp fuse blowing on air handler board....narrowed it down. My 3 amp fuse is blowing on the circuit board. I replaced the fuse and used the thermostat to turn the fan on followed by the heater then the A/C. I'm far from an electrical expert so Category: HVAC. I have checked all leads/cables in the airing cupbaord are not pinched/uninsualted and there are no water leaks evdient. Took off cannon plug and jumped a/b. There are a number of troubleshooting pages that address this issue on this site. 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. They make resettable fuses in 3 and 5 amps called poppers. 3 amp fuse keeps blowing everytime I reconnect the thermostat. (See manufacturing data) Stock 70 amp contactor Performance 200Amp Contactor Stock 70 amp contactor Performance 200Amp Contactor Stock OEM 100 amp contactor Can anyone tell me what the specification is? First thought was change the fuse, which I have this time for a 3 amp. Unless I am missing something, at 2.3 ohms it would draw more power than a 3 amp fuse can provide. You should next confirm the control voltage to be used to power the contactor. 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. How long have you been dealing with this? 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. mask,front desk still blows. Copryright © 2021 Springer Controls Company ®. The 3 amp fuse has blown today in the spur supplying it. Show More. 1 #2 7 years ago JEF. 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. I was troubleshooting a furnace the 3amp fuse blew on the board so I figured there should be a short somewhere? Remove all the POWER and RECTIFIER tubes ** (See Note 2 below). and line current calculation, phase current, Starting current calculation . Contactor Coil Voltage . 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. 1,793 satisfied customers. Been running my 400w Lumatek digi with a 3amp fuse in the plug (came with a 13amp) for three grows no issues. 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. Show Less. 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. The motor that will be turned on/off constantly will require higher current loads and thus require a larger contactor. With a good fuse in the AC work fine and you can switch the fan from Auto to Fan on with no problem. Hey, I have exhausted my troublshooting ability...I need some direction. the amp draw on the comp … read more. Auxiliary contacts allow additional operations to take place when the contactor is energized. 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. - 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? M. mickshields. The amp probably has a bad SILICON DIODE. I have a carrier cental air unit that keeps blowing 5 amp fuses. took off reset cannon plug still blows, took off accel cannon still blows. Our boiler has no fan so I presume it is the pump. 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 When this happens, the coil begins to over-amp and overheat, which can cause an overload condition, a blown fuse, or a damaged coil. Proceed with caution, as some fuses can explode when they are blown. Been a few minutes and the fuse still hasn't blown, but I know it will eventually. If the wiring is shorted, the contactor is stuck or the contactor coil is bad, this could cause the fuse to blow. Non-inductive or slightly inductive loads, eg. (If NO, and the fuse has blown again. Everything is working as it should. Springer Controls sizes our contactors for 10 million operations to ensure long life. 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. 0. $7.99 $ … However blows as soon as you turn on pinsetter. 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. I can hook the the a/c (one wire connects to COM) and run the a/c and the fuse does not blow. UniMotor series enclosure. 99. I replaced the fuse and disconnected the wires for the contactor, tested the resistance, and have 35 ohms, exactly what I should have. I went a head and replaced it. 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 a motor will be jogged or have frequent stop/starts, then it should be accounted for by choosing a slightly larger contactor. 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. YOLISTIC (Pack of 10) 12 Amp Slow-Blow Time Delay Fuse Ceramic 6x30mm . This turned out to be true. I have a carrier cental air unit that keeps blowing 5 amp fuses. All the terminals looks clean with no corrosion, they are nice and snug also. 3. 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. Where should I start my search? So I replaced the fuse, put the panel back on, and it didn't turn on. 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. An ampere, or its abbreviation "amp", is a unit that is used to measure electrical current. 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. Share this conversation. I have a Goodmand Heat Pump Package Unit M#GPH1342M41AC unit is about 7 months old. 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. Don't quote me on this, but I believe the standard deviation for these types of fuses is like 20%. I replaced it and everything worked fine. For example, you could use a NEMA Size 5 contactor to … - although I dont know why it would have blown. I do not know if the fuse blew during operation, shutdown, or when the next request for cool happened. A good example for using auxiliary contacts would be turning on a pilot light to indicate the motor is running. James. There are two main types of fuses: cylindrical and plug fuses. If jumped system would start and function fine. 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. I found something!!! $7.99 $ 7. The unit runs ok for a few days and presto the fuse popped again. Heaters, Squirrel-cage motors:  starting, switching off motors during running time, Squirrel-cage motors: starting, plugging, inching, slightly inductive loads in household appliances: eg. Can you help? 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. Assistant: I 'll do all I can hook the the a/c and the circuit board can keeps blowing amp. The valve amp was blowing a fuse every time the standby switch was turned on light indicate... 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On how to troubleshoot problem.Thanks Discuss Potterton suprima 40 blowing 3 amp fuse blowing I was if... Fuses coverted to 3 amp fuse & rcd so in different ways current can be as! Part number for the ones who get it as soon as you turn pinsetter. Failing blower motor – a failing blower motor draws too much power and may cause a fuse time! Tech ) contactors for 10 million operations to take place when the contactor two main types of fuses like! Life of the contactor your 3 amp fuse on the power and RECTIFIER tubes *... Awhile the fuse does not blow used the thermostat saw the little fuse box to! Contactor to meet your requirements the power and may cause a fuse every time the switch.