Question about Goodman GMS90703BXA Heater

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Goodman GMS80903bha Blower mtr cuntinues to run after i disconnect the thermostat.also ohmed out the rool out switches.

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Did you check high limit or safety switches?, was the filters plugged?

Posted on Nov 03, 2008

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How do i fix AC Dolcool split type, Model KF61G, compressor not working. Breaker keep tripping.

It sounds like compressor is shorted,check ohms from compressor terminals to copper,clean area on copper.if it reads ohms,short,if not I would start by disconnecting outdoor MTR,indoor MTR,& see if still tripping

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Goodman furnace a36-20 fan runs non stop

is green wire from thermostat or from outdoor. retrace and change as needed. If not Goodman has a tech support number you can call while looking at unit.

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Goodman model PGB036075-1B when I turn on the heater the blower starts soon as the burnner starts about 2 sec. later the blower stops. then of course it overheats. What would cause the blower to shut...

bad blower motor run capacitor and or motor. Test capacitor or just replace in expensive if dont have test meters. If change motor make sure get new matching capacitor for new mtr.

Nov 15, 2012 | Goodman Heating & Cooling

1 Answer

Propain gass dyer. runs but very little heat. replaced gas valve coils and no change. Now I believe I have to check limit switches, but not sure how to test..What about the RADIANT SENSOR? NEED...


More than limit switches if burner is turning on but heating is poor you should check cycling themostat and then blower motor, lint filter and parts comprised in blower assembly.

When the problem is the high limit, there is no heat at all.
When the problem is radiant sensor, there is no heat at all.

Poor heating means either: defective cycling thermostat; clogged air ducts; defective blower system, problem with timer or temperature selector.

If the heating turns off in the middle of the cycle check also door switch.

Here Cycling thermostat:


The cycling thermostat is located in the blower assembly. Here removal instructions. Disconnect power first:


The thermostat can be tested using a multimeter. Set the multimeter on impedance (Ohms). Good thermostat will read about Ohms at room and will read open (infinity) at 150F.

Once in there also check the thermal fuse and check blower assembly. Remove lint and make sure blower is working. Thermal fuse is tested reading impedance across its two contacts. Remove fuse from circuit and touch with multimeter probes fuse's contacts (same for thermostat). If fuse is good it will read zero Ohms or very little impedance. a bad fuse reads infinity.

Check also the exhaust. Make sure there is no blockage.

Operations are illustrated from page 72 of service manual: Here the service manual.


About the flame sensor, that is a part that rarely fails. If the dryer ignites the radiant sensor is not responsible for the fault.
The radiant sensor is mounted in parallel with the coil.

When temperature is reached the sensor opens up allowing power to burner valve (valve 2). Testing the flame sensor like a thermostat is difficult because it opens up at high temp. I read volts while operating. I suggest users carrying only maintenance that can be performed with power off.


If the burner shuts down at random more than the sensor check the door switch. Run a cycle with door switch contacts jumped.

Start checking cycling thermostat and air ducts, those are problems that usually cause low heating.



Oct 21, 2011 | Maytag Neptune MDG5500AW Gas Dryer

1 Answer

Goodman GMH950904CXAC with white rogers programmable stat. Turn the furnace on and the blower comes on whether there is a call for cool or not. Red led on control board is on, indicating OK. Disconnect...

make sure the blower is not set on rather than auto or the blower will run all the time. You might want to disconnect the thermostat and test the low voltage circuit to make sure the wires are not shorted

Aug 12, 2009 | Heating & Cooling

2 Answers

Goodman a/c blower fan will not shut off

Unhook the thermostat wires on the furnace. If the blower shuts off then your problem is either the thermostat or the thermostat wires. If it contiues to run check you high limit switches next. If all else fails you most likely have a bad blower relay. On most modern furnaces the blower relay is part of the circuit board.
Good luck

Mar 29, 2009 | Goodman CLQ36AR49 Air Conditioner

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Goodman GMP050-3

If you do not have two furnaces hooked together, you have a bad circuit board or an improper ground or neutral wire.

Dec 09, 2008 | Goodman GMS90703BXA Heater

1 Answer

Goodman Furnace Intermittent

Does this piece, have an economizer and or vent draft options installed? I hope not. If not, I had the same sort of problem with a Payne unit, sort of the same style. First things first. bypass the thermostat by making a jumper or connecting the red to the white wire on the thermostat, see if that stops the problem. Repair techs are all to anxious to replace the board anymore. If the repair man installed a relay to bypass the blower control he is in over his head, the limit switch determines when the fan shuts on & off based on temperature. There is a relay on the control board that basically carries the load for the motor. Dont have anything else installed that need not be there (there is enopugh crap already from the factory) If you want to really fix this I need to know if you have and can read a volt/ohm meter and can understand a wiring diagram, hopefully yours is still there. let me know after the thermostat thing and I can walk you through this.

Dec 25, 2007 | Goodman GMS90703BXA Heater

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