Question about Goodman GMS90703BXA Heater

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Pilot light is on but burner will not come on

When i slide the thermostat up there is no spark , does this mean a fuse is blown. manually the fan works.

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There shouldn't be any spark. These furnaces light the burners with a hot surface ignitor. Once electricity powers the hsi it will cause to get hot and glow bright orange. If this is not happening, you probably have a bad hsi. This is a common problem and easily resolved.

Posted on Oct 07, 2009

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You may need to replace the ignighter!...easy fix! or what it really sounds like is your thermastat

Posted on Dec 11, 2008

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No flame


Several steps here to check...
turn power off unit and back on
set thermostat to heat
watch for pilot to ignite..igniter should glow orange or cherry red or spark if its a spark type ignitor
Did you see a pilot light ignite?

If not you probably have a bad igniter.

If pilot lit....in a little bit you hear a click of the gas valve opening..then the main burners will ignite

If you see the pilot and the main burner lights but goes out in a few minutes or immediately you may have an issue of the "high limit" switch tripping.

Is the blower fan turning that blows air out of your vents?
are all your vents open in your house? too many times i see homes with almost all vents shut.

Jan 08, 2011 | Goodman GMS90703BXA Heater

1 Answer

My friend has a mobile home that has an Intertherm model #4139000 no manual but th pilot light is lit but and the fan motor kicks n on run only not on auto, the burner never fires up. They changed th...


If your friends heater has a pilot light but no burner I would be inclined to change the gas valve. You need to get the proper gas valve for mobil homes. They require a two stage slow opening valve. Make sure it is set up for the right type of fuel. If possible have someone with experience working with gas to help you with repairs. I hope this helps you some. Thanks

Nov 19, 2010 | Heaters

1 Answer

Fan turns on, pilot on left side turns on red light at bottom stays solid during entire time then pilot goes out and blower stops no heat please help


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 remaing 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).

Oct 05, 2010 | Goodman GMS90703BXA Heater

1 Answer

Furnace was not coming on red light was blinking once now its working wondering what the one blink means cant find my manual


One blink does not tell you much, it tried 3 times to start and did not.

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).

Jan 10, 2010 | Goodman GMS90703BXA Heater

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