Question about Goodman GMS90703BXA Heater

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Furnace integrated control module

I have a goodman gsm9 furnace and i wanted to know what the default setting was on the integrated control module. Is the light supposed to stay continuously on? I've found some places saying yes, but the manual says that if the furnace is not working and the light is continuously on, the furnace may not be getting a signal from the thermostat. I'm pretty sure the furnace is working because if you turn the temperature up, you can here the furnace start, see the burners ignite, and the temperature of the room on the thermostat increases.

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The light is supposed to be on, if there is a fault in the furnace the light will begin to give u a flash pattern... ie; three flashes...or two flashes.. on the furnace exterior or on one of the doors there should be a fault code chart.... read the chart on the unit it will tell you what light is on and when..

Posted on Jan 15, 2009

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Goodman Model GMV950905DX-an electrical surge burned out the transformer which I replaced, also replaced the circuit board. The variable speed furnace will no longer kick into high speed and it will l


If I remember correctly, there are dip switches on that control board that can be set individually. It is possible that it is just a setup issue. The switch positions should be explained in the installation instructions. I know that some Goodman and Amana two stage furnaces can be controlled by a single stage thermostat, but the dip switches have to be set properly. If the switches are set correctly the furnace will run in low stage heat for approximately 5 minutes and if the thermostat hasn't satisfied yet, it will kick in to high stage heat. I hope this points you in the right direction!

Dec 16, 2014 | Goodman Manufacturing Goodman Gas Furnace...

1 Answer

Where is integrated control module located?


http://www.alpinehomeair.com/related/RT6621024R4%2011.2013.pdf
Page 6 shows location. This is for slightly different model number (GMH81205D*BA), but should be same location for yours.

Nov 03, 2014 | Goodman Manufacturing Goodman GMH81205DX...

1 Answer

Goodman furnace fan runs all the time


Hello, this can be caused by a bad relay on the integrated control board or a short in the low voltage wiring. Easy way to check is unhook the green wire from the G terminal on the control board, if it stops there is a short in tje wiring, if it does not stop the control board must be replaced due to a bad relay.

Oct 28, 2011 | Goodman GMS90703BXA Heater

1 Answer

Fuse on control module blows when calling for cooling


Yes.
Disconnect the the red and the yellow wires at the outdoor unit. Then replace the fuse and turn on the power.......see if the fuse blew. If the fuse blew, your problem is most likely a short in the low voltage wiring. Check for crimped or damage wire or wire insulation and repair as necessary. If the fuse is okay, then the problem is within your outdoor unit.......again inspect all wiring for any damaged insulation or crimped wiring.
Check these items and let us know.....we can guide you further after you perform these checks. :-)

May 26, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Goodman GS9 propane furnace inducer motor runs continuously


it sounds like the low temp limit switch, the one that cools the furnace down with the burner off and the thermostat open, when it cools to a point the fan stops, the other switch in burner area turns burner off/on, hope this helps

Jan 31, 2010 | Goodman GMS90703BXA Heater

1 Answer

I have a Goodman GMH95/GCH9 furnace, the integrated control module LED is flashing eight(8) time and the troubleshooting chart only goes to seven(7)


open the front door to the furnace to access the controls there should be a red button try pushing it to reset

Oct 10, 2009 | Heating & Cooling

1 Answer

Furnace won't turn on....


jump out thermostat or try jumping out the pressure switch

Feb 23, 2009 | Goodman GMS90703BXA Heater

1 Answer

Furnace starts properly, then shuts down, led flashes 8 times


The first thing to look at is the flame sense rod.
Shut off power to the furnace, remove, clean sensor with steel wool or sandpaper then reinstall the sensor. Reapply power and it should run properly.

Jan 10, 2009 | Goodman GMS90703BXA Heater

2 Answers

Goodman furnace blinked 1 time


Furnace attempted to start but failed after so manay tries. This may help you.

Sequence of operation, Gas Furnace.

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 ignitor. The ignitor will glow and you will be able to see it if viewed thru the small inspection port. Once the ignitor 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 ignitor does not energize (bad control, bad ignitor), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not lite (dirty pilot), the burner does not lite (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).

Most newer furnaces will have a diagnostic center or control built into the control module. You may be able to view it as it is running thru a small viewing port. Some models will require the removal of an access panel prior to finding it. On the reverse of the access panel, there will be a diagnostic chart that will aide you in understanding any error code recorded (usually a blinking light).

This is why we technicians earn the big bucks!

Dec 05, 2008 | Goodman GMS90703BXA Heater

2 Answers

Furnace won't stay running


1
1 FLASH
Furnace fails to operate.
• Integrated control module
diagnostic LED is
flashing ONE (1) flash.
• Furnace lockout due
to an excessive
number of ignition
“retries” (3 total)1.
• Failure to establish flame.
Cause may be no gas to
burners, front cover
pressure switch stuck open,
bad igniter or igniter
alignment, improper orifices,
or coated/oxidized or
improperly connected flame
sensor.
• Loss of flame after establishment.
Cause may be
interrupted gas supply, lazy
burner flames (improper gas
pressure or restriction in flue
and/or combustion air
piping), front cover pressure
switch opening, or improper
induced draft blower
performance.
• Locate and correct gas
interruption.
• Check front cover
pressure switch
operation (hose, wiring,
contact operation).
Correct if necessary.
• Replace or realign
igniter.
• Check flame sense
signal. Sand sensor if
coated and/or oxidized.
• Check flue piping for
blockage, proper
length, elbows, and
termination.
• Verify proper induced
draft blower performance.

Nov 23, 2008 | Goodman GMS90703BXA Heater

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