Question about Gibson Nordyne GR6GD-X24K045C 2 Ton 13 Seer 45,000 BTU Gas Electric Package Unit

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Lowvoltage fuse keeps blowing

The 3 amp fuse keeps blowing i have replaced the board and the transformer any other ideas to check

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The contactor on the condensor if it blows on a call for cool.

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Coleman furnace dgaa077bdta


The control fuses keep blowing tells me one or more of the control that operate the control on 24 volts is malfuctioning. Most controls operate at about 5 watts and on a clamp on amp meter normally pull about 0.2 amp (p = current x voltage, 5 watts = 0.2 amps x 25 volts) I install 75 watt 24 volt transformer with a resettable overload to save on fuses. I reset the transformer and quickly go to the controls and determine the amp draw. When I find the one >0.2 amps I found the problem. The things to check is the emergency heat sequencer, fan control sequencer, reversing valve for heat pumps, main contactor on the condensing unit and any other 24 volt control loads. I have had to replace the themostat wire because the increase current for the thermostat wire can cause the entire length of wire to form a long heater and cause insulation degradationa and cause the thermostat wire to short out and blow the fuses.
Hope this helps

Aug 30, 2014 | Coleman Mobile Modular Home Gas Furnace...

1 Answer

Control transformer keeps shorting out


One or more of the solenoids operated switches is your most probable cause. If you have a clamp on amp meter, measure the amps pulled by each component with a solenoid. The reversing valve solenoid and the main contactor solenoid. Each one of the these components are typically rated at 6watts. If your control voltage is around 25 volts, your amp draw should be about .24 amps max. If your transformer cannot be reset without blowing, install a 3 amp inline fuse so when the overload occurs the only thing that blow is an inexpensive fuse costing about 25 cents instead of a several dollar transformer. If your fuse/transformer immediately blows, try looking for a direct ground in the control wiring. If problems has persisted for a while, you may even have to look into replacing your thermostat wire. The control wire travels over the thermostat wire throught the thermostat and excess amps through the thermostat wire can break down the insulation jacket and short to the common wire causing the control transformer to blow. Another thing to check is the condition of your thermostat wire to check if the insulation is shredding off. Old thermostat wire, especially thermostat wire exposed to sunlight deteriorates quicker. Hope this helps.

Jan 10, 2014 | Rheem 14AJM49A01-RHSLHM4821 4 Ton 14.50...

1 Answer

Have a weatherking 13PJA that keeps blowing the 3 amp fuse. any thoughts?


blowing a 3amp fuse could be a short in the system or I've seen that it should be a 5 amp fuse check your 24v wires ohm them out make sure theirs not a break and make sure your getting 24 out of your transformer

Oct 23, 2011 | Heating & Cooling

1 Answer

I have a duo therm model 57915531. i have checked the breakers all the fuses and the thermostat. i have found a 3 amp fuse in the control panel of the roof unit. this fuse was blown. i replaced it and it...


That unit has a thermostat I believe and 12 or 24 volts to power it. The 3 amps tells me it may be either line or low voltage, see manual. the fuse blows due to a short in the control circuit, a transformer if low voltage.

Sep 10, 2011 | Dometic Rooftop RV Air Conditioner

1 Answer

The 5 amp fuse on the board keeps blowing the transformer smoked i replaced that but it still blows the fuse when i install a new fuse.the contactor buzzes then the fuse blows.


You ahve a short in the low voltage system, thats why the fuse blows and the transformer burned out. Find the short and then replace that fuse and that should solve your problem.

Jun 28, 2011 | Heating & Cooling

2 Answers

Transformer and circuit board blown on Nordyne AC this happened suddenly when the a/c has been running fine, also it blows the 3 amp fuse on the circuit board, I replaced with a 10 amp fuse and it ran fine...


Lol. I'm trying to find a good way to put this and the best thing I can think of is this... dental floss is skinny enough to squeeze between your teeth, if you tri

Sep 24, 2017 | Heating & Cooling

1 Answer

Brand new furnace, transformer opens on primary side. also seems that transformer is hotter than normal. I have checked all componets for short to ground and have replaced control board.


The short is on the 24V side...I would put a 3 amp fuse in series with the Hot 24v line before it gets to the circuit board from the transformer you will have to replace again....have a few spare fuses....after having done that./...turn the power on and call for heat...Observe what happens and what stage of the cycle you're in when the fuse blows...Exhaust fan starts...Ignitor starts to warn up....etc...I need more info...shorts are hard enough to find as it is.......does it blow the fuse immediately...usually it will go through a few stages before you get to the problem piece....Make and Model of the furnace could also be helpful to me

Oct 31, 2009 | Heating & Cooling

2 Answers

Air stopped. nothing working on furnace. breakers are all good. is there a fuse on the furnace itself


sometimes there will be a lowvoltage fuse like a 3amp or 5amp looks like a car fuse

Aug 03, 2009 | Heating & Cooling

2 Answers

One unit runs a while, powers down, other unit blows transformer


you say it keeps blowing the transformer? you mean circuit breaker? if it is the circuit breaker, have the wiring checked for a short, if no short do a ohm test on the compressor. it may have shorted out internaly.

May 31, 2009 | Haier HC48C1VAR Central Air Conditioner

4 Answers

Blown fuse 1.25amp Board pos. 1452


The main fuse should be a 4 amp fuse not a 1.25 amp.

Jan 26, 2007 | Philips 32PT6441/37 32" TV

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