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I have a Goodman GMVM970603BN Furnace and GSXC160361 AC unit. My ComfortNet thermostat suddenly stopped displaying outside temperature. Everything still operates fine.

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Randy Schumann

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  • 410 Answers

When your thermostat was installed, a small sensor with transmitter was placed somewhere outside of your house, (Mine was placed under the house, zip tied to a floor joist). You need to find the sensor (about the size of a zippo lighter), open it, and replace the battery and put it back where it was.

Posted on Feb 23, 2020

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Anonymous

  • 182 Answers

SOURCE: Goodman Furnace/AC unit not working

3 amp is standard.the fuse is blowing to protect the transformer.It is telling you that there is a short in the low voltage wiring.Goodman also had an issue with the coil shorting on the contactor.To prevent damage.....i'd call a pro.It should be a fairly simple repair.

Posted on Jul 04, 2008

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Anonymous

  • 68 Answers

SOURCE: ATWOOD MOBILE FURNACE RUNS WHEN IT WANTS/

Check your furnace for power. will be 4 wires. power ground and 2 thermostat wires. Check for power at the time delay relay, if you have power there check for power going in the fan motor, if power in motor wire, motor is bad. If no power in motor wire and power going to circuit board take the 2 thermostat wire apart and wrap the 2 together comimg from the thermostat. Fan will stat in about 30 seconds. If it does you need a control kit in the ac. But sounds to me like you have a furnace problem.

Posted on Mar 19, 2009

Anonymous

  • 26 Answers

SOURCE: I have a goodman furnace and ac unit the fan and

Look at the contactor on the condensing unit, remove the low voltage wires to the contactor and turn on the system. If the low voltage fuse doesn't blow, replace the contactor.

Posted on Jul 07, 2009

shastalaker7

Robert Horton

  • 1515 Answers

SOURCE: Thermostat not turning on furnace.

Hi, You need to go to the furnace to see if you have lost the 24 volt supply, the transformer. If you have a circuit board, see if it has a 3 to 5 amp fuse plugged into it that is blown. This will kill power to stat causing nothing to work. Let me no what you find and we can go from there.
Shastalaker7

Posted on Dec 29, 2009

Therinnaiguy

Chandler Ede

  • 1420 Answers

SOURCE: Furnace does not turn on normally

Having to reset it tells me that there is probably an error code blinking on the control board. Look for a small viewing port that looks into the cabinet. Count the number of blinks then remove the panels to find the wiring diagram pasted on one of them. On the diagram you will find a diagnostic code to help you narrow down the problem. It could be as simple as a plugged air filter.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Posted on Feb 09, 2010

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