Question about Goodman GMS90703BXA Heater

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Making noise my gmp 125-4 is making noise when blower comes no

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Check your air filter. The blower may be off balance or have dirt in some of the fins. Look on the blower wheel for a small tab of metal used to keep the blower in balance. It may have fallen off.

Posted on Jan 02, 2009

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Have a gmp 125-5 furnace and light blinks 5 times


Here what i found , five LED flashes to mean your furnace senses a flame without a call for heat. This could be from a gas valve closing slowly or a burner flame lingering.

Mar 29, 2014 | Heaters

1 Answer

Have a gmp125-4 furance blower runs all the time checked themostat wires error code 1 blink then 2 then 3 then 5 furance works if you turn power off turn back on when heat kickes off blower comes on gives...


Sounds like limit switch issue. Furnace heats up, high temp limit switch opens, fan will stay on. GMP model is older and do not have the codes.
May be over fired, have airflow problem, to cause the limit to open.
Next time before shutting off power, try to find the limit, it has two wires that connect to a 1.5 x 2 inch card mount to the furnace fire wall. tap on it and see if the blower stops. If so replace the limit.

Sep 06, 2011 | Goodman Heaters

1 Answer

Our Goodman furnace just started making a a very loud grinding noise when the furnace turns on. Also the temperature in the house keeps dropping so we have to keep adjusting teh thermostat. Any advice on...


If it makes the noise before the blower comes on it would be the exhaust fan. If it makes the noise when the blower comes on then I would say either the blower motor or bearings to the fan.

Dec 27, 2010 | Goodman GMS90703BXA Heater

1 Answer

My Goodman GMP 125-4 furnace has 4 blinking lights and we currently are unable to get it to come on. What might be wrong?


if this is an error code and you mean that the light blinks 4 times then it is the limit circuit. This could mean either the high limit or a roll out switch is open. the limit switch is right in the center of the furnace above the burner and roll out switches are probably somewhere around the opening of the burner. Follow the wires from the limit to find a roll out switch cause they are in line with each other and the rool out switch could have a button to reset it. However if the roll out is not tripped then you could need to change the limit. Only way to know is to check for continuity.

Dec 04, 2010 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Goodmanfurnace gmp 125-4 won't ignite


Does the ignitor glow? If not, make sure it is getting 120vac to it after the inducer motor comes on...and you can not take the wires off of the ignitor to check them that way, you will get a false positive reading. It has to be hooked up and you can check at the IND and Neut on the board. If it is working, make sure you are getting 24vac to the gas valve. If you are not, you need to check all the limit switches on that purple wire between the board and the valve. If you are getting 24v at the board at the correct time and not at the valve, one of the limits is open. NOTE, you can read 14 volts or close to the valve from the time you have a call for heat, that is normal, but the voltage should jump to 24 about 5-10 seconds after the ignitor starts to glow. After 3-4 seconds if no flame is present, the flame sensor circuit will start the sequence over 3 times then lock out (code1) for one hour and retry.

Jan 02, 2010 | Goodman GMS90703BXA Heater

2 Answers

I have a goodman GMP 125-5 furnace. I have


sounds like the primary limit typically behind the gas valve its larger then the others, rectangle in shape with 2 wires going to it. be careful if your bypassing limit this can create a very hazardous condition

Nov 06, 2009 | Goodman GDS80904BNA Open Flame Heater

1 Answer

I have a GMP 100 furnance, The induction moter does not come on and I have three (3) blinks coming from the red light. whats the problem


remove two wires to inducer, make a call for heat at your stat , if there is no120 vlts to inducer you havea bad controlboard, if you have 120 your motor is bad, the inducer is powered before anything

Sep 30, 2009 | Goodman Heaters

1 Answer

Goodman furnace\ blower comes on,unasked


Sounds like the fan switch on the furnace is set to low. Turn power off to furnace, take door off of furnace look for a fan switch, it may be a fan - limit together. The limit settings should be approximately 160° to 200°, and the fan settings should be about 100° to 140° set it to 120° it it's already set there then you probably need to replace it.

Aug 03, 2009 | Heaters

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