Question about Goodman GMS90703BXA Heater

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Why the Goodman air heat unit that will not come on?

I have check the ingitor and it was good. The heater will not fire.

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We are trying to loacte teh starter for the pilot. Seems to kick on but no hot air, so not heat throughout the house. Sorry, total mentally challenged in basic home appliance repair...

Posted on Jan 28, 2009

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I have a goodman heater and ac unit ,two stage ,problem the heat not very hot,feels more like luke warm.is there any way to addjust this.


Usually this is due to restricted air flow. So check the filter and ac coil (above the furnace) for filth and debris. Secondly adjusting the blower off delay dip switch on the circuit board could help some. Probably want to change it to a lower setting. Good Luck! :)

Dec 07, 2010 | Goodman GMS90703BXA Heater

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

Goodman gps100-4 heater, tied to heat pump intermittent gas valve operation. all safeties check ok.


If you have 24v to gas valve and a good ground to unit, check gas pressure with a manometer to ensure your input gas supply is correct..11-13" w.c. for LP and 5-10" w.c. for natural. If out of that range, valve may not open. You have to ensure you have 24v to valve after ignitor comes on..about 5-10 seconds after ignitor starts glowing. I would check from pos side of valve to chassis ground. If you do and your input pressure is good, you have a bad valve. Monitor the voltage to the valve to make sure it does not lose partial voltage during the 3-4 seconds it is energized before the flame sensor stops the sequence. And keep the manometer on the input side while the unit is firing so you can see if the pressure drops when the gas valve opens. If it does, your regulator outside is not working right.
If those look ok, see if you get output pressure when it does not fire. If you do...3.5" for nat, 10" for LP, the ignitor may not be getting quite hot enough every time.
Hope that helps a little

Jan 06, 2010 | Goodman PHKJ048-1 Air Conditioner

1 Answer

I have a goodman gmp125-4. The heater comes on the furnace fires up with all the burners on and it shuts off after maybe 5-6 minutes and then the module light blinks 4 times. Are there any solutions for...


You have a serious problem. That is the primary limit overload in the heat exchanger. Either your gas pressure is too high...checked with a manometer should be 3.5" w.c. for Natural gas and 10" w.c. for LP, or your air speed is too slow. If you have a restriction in the duct, even dirty filter, your fan speed will slow causing the temp rise from return to supply air to rise. The unit data plate has the temp rise range on it...for that unit it is probably 45-75 or close thereabouts. you should check the air temps a couple of feet from the unit on the return and supply duct. If the data plate shows 75, or whatever, your actual temp rise should be 10 degrees below the max on the data plate or in that case 65 higher. This unit has a three speed motor, if Black from the motor is not on the heat terminal of the control board,start there. With power off, put the black wire on the heat stake on on the board. If it is already on the cool spade, you can make a jumper and use that same speed for both heat and cooling. After this is done, recheck the temp rise on the air and see if you get about 10 below the max on that temp rise data.

If the temp rise looks good, be very careful in doing this; with power off, remove the primary limit, which is the one going into the exchanger, and either temporarily jump out those two wires or just set it aside still hooked up so the wires dont touch anything and with a temp probe or thermometer stick in the hole where the limit goes, start the unit and check the temp at that spot. That limit is 210 degrees. If it is rising higher than that and you are sure the temp rise is good, you probably have crack in the heat exchanger shooting hot air in that area close to the limit.
Hope that helps.

Jan 05, 2010 | Goodman GDS80904BNA Open Flame Heater

2 Answers

No Heat Goodman GDS80904BNA


If the hot surface ignitor comes on and fires the burners, and then shuts back down, you need to take a look at the flame sensor. It is a ceramic rod with a metal tip that rests in the pilot flame. When heated from burners, it sends a signal to the main control module, circuit board, which ever this unit is equipped with to keep the burners on. It is a safety to shut the burners down if there is a problem. Take some fine steel wool to clean the metal tip on this and this should take care of the problem. If this does not do it, then 99% of the time you have a faulty control board or module. It will have to be replaced.It is where this flame sensor connects.It will continue to drop out of the circuit, and the fan will start and run. You're T-stat is good or the Hot Surface ignitor would not glow. You will need to take as much info you can from the unit, Goodman and the control, all numbers with you.You can purchase this part at a appliance parts house, or air conditioning parts house. Please keep me informed, I would like to hear back from you. I hope this has given you some direction to follow.Good Luck,
Shastalaker7

Dec 08, 2009 | Goodman GDS80904BNA Open Flame Heater

1 Answer

Indication light "RED" on continuously during operation. Unit fires up, heats up and blows hot air. Why is LED "RED" on when unit shuts down?


not knowing wich one is on, this red light could be your power indicator light..
it stays on during any operation,
you should be able to see it through the sight glass
if it were flashing,,,, there would be a problem

Oct 13, 2009 | Goodman GMS90703BXA Heater

1 Answer

Combustion fan and circulating fan running and no heat


Check near the squirrel cage fan and see if there is a sail switch.  Sometimes these are used to confirm air movement prior to firing off the gas furnace.  It is simply a square piece of metal on a stick that attaches to a microswitch.  This switch is then depressed when the fan pushes the air (and the metal piece) allowing the burner to fire off.
Hope this helps.

Feb 03, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman gmp050-03 heater


Either yourself or a Heating specialist will have to replace the gas valve.. Once installed you will plug unit back in which will reset power board and should work fine

Dec 23, 2008 | Goodman GDS80904BNA Open Flame Heater

1 Answer

AIR or Heat wont come on/ goodman GMP075-3


If there is no blinking light, then the unit is not seeing a call for heat or cool. My guess is a lose or broken wire in the thermostat circuit. Try and putting a jumper across the red and white heat terminals inside the furnace and manually closing the door switch. If you get heat, it's telling you there is a wiring issue. If you get nothing, it's a bad circuit board.

Jun 08, 2008 | Goodman GMS90703BXA Heater

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