Question about Goodman GDS80904BNA Open Flame Heater

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Air flow seems low

I want to speed up my blower motor but the diag is unreadable

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Ok dose this model furnace have a circuit board? if so there should be markings on the board where the blower leads are attached. such as cool heat park/or un used motor leads. and to speed up your blower it is going to be either the red wire or black wire they some times alternate you will have to see how the blower sounds or feels.. but you are going to replace the wire going to the heat terminal with a red or black wire and see how that works for ya. just makesure the power is off before sticking your fingers in there... also it may seem too obvious but ill say it anyway check ait filter and make sure all your dampers are open properly on the supply duct work

Posted on Jan 22, 2009

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Blower MoterElectrialDiagram for a 40,000Furnaces to a Ton1/2 Air conditioner

You will put the red wire from the blower on the terminal marked "heat" on the control board. Black= high speed Red= low speed Yellow/Blue = med low/ med high Hope this helps!

Nov 14, 2012 | Goodman GMS90703BXA Heater

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Thermostat not registering on auto when below temp set. Have to set fan to on before will blow; can hear pilot light kicking on?

This could actually be a couple of things. When below set temp does the unit turn on (ie produce heat), and the blower just never starts? If that is the case then the air coming from the registars will be cool to cold. This would indicate a problem with the "heating" side of the system. If the air from the registars is cool to warm, then it is a problem with your blower motor. Turning the switch from Auto to On, changes the blower from Low speed (used for heat) to High speed (used in cooling). The first thing to do, is to isolate which side of the system is failing, then troubleshoot from there. Hope this helps

Jan 15, 2010 | Heating & Cooling

2 Answers

Low does not work, medium and high do

You probably cant fix it, this sounds like a multispeed blower with hi/medium/lo settings. You
can either replace the motor or connect one of the
working speeds to low/med or low/hi. or bump med to low and high to medium.

Jan 12, 2010 | Desa International Blower Glow Warm Wall...

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Have a Goodman GMT070-3B which the vent motor seems to be sticking. I took apart and cleaned the brushes and reassembled. The furnace will come on only after what seems like the vent motor comes up to...

The whole assembly must be replaced.

The sequence of operation is -

Combustion fan purges the heat exchanger. A pressure switch verifies combustion air fan is running. Usually a 30-45 second purge before the hot surface ignitor glows, or the spark ignition starts.

Gas valve opens after 10-15 seconds and main burners light. Control board monitors for flame and shuts gas valve after 2-3 seconds if main burner does not light.

If burner does not light, some boards repeat this for 3 tries, then locks out and is reset by cycling power.

Air blower comes on after another 30-45 seconds after main burner ignition.

Times may vary based on the specific controller board. A flow chart and timing sequence should be located somewhere on the unit, usually in the fan compartment.

Dec 16, 2009 | Goodman GMS90703BXA Heater

1 Answer

Rheem gas furnace blower unit not working properly

look at circuit board and follow wires that come from fan motor, if this is a standard motor black is high and it will be going to a prong that says cool, red is low and it will go to heat, you will have a yellow and a blue that are "parked" remove red park it were the blue is and put blue on heat, if this is a variable speed motor you will have to set dip switches via your equipment manual

Sep 29, 2009 | Heating & Cooling

1 Answer

I put in a 90,000 btu furnace with a 4 ton blower and a 2 ton air conditioner. how can i adjust the blower speed to match the 2 ton usage

I would suggest getting a 4 ton AC. Equipment that is not matched properly usually does not function properly. What is the size of the space you are trying to square feet? One other possibility would be to try to rewire it. If it is a multispeed motor you could try to wire it to run on low speed during the AC cycle....but that's a long shot.

Sep 20, 2009 | Heating & Cooling

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My blower fan came off the motor shaft.


Nov 23, 2008 | Goodman GMS90703BXA Heater

1 Answer

Reduce blower speed

Motor speeds on the blower are always remember black is high, blue in med. and red is low sometimes blowers are 4 speeds but the main colors are the black blue and red. Now where to change locate the wires coming from blower to a box or control board. control board has setting for heating and cooling speeds for the blower. You might see blue on heating which would be medium speed so take the red off park terminal and change places with the blue. Now if you have a fan control switch it looks like a dail in the middle of the furnace with numbers on the face with pointers set at the numbers. follow the wires from there to the electrical box and open box. find color of blower and switch be sure to cap off the wire you change. Wire nut would be good.

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Yes, look at the control board and follow a larger diameter red wire and see if it goes to the blower. Now follow the orange wire from the blower to the circuit board and swap wire locations with the red one. This will change the blower speed from Low to Medium Low. The Blue wire will give you Medium and may be too fast. The faster the blower goes, the cooler the air feels coming out of the registers. If your ductwork is undersized or your air filter is too restrictive, this will interfere with air flow and not deliver the necessary heat when you need it. Changing the blower speed is only a band-aid to bigger issues.

I hope this helps!

Nov 05, 2007 | Goodman GMS90703BXA Heater

1 Answer


On the blower, look for a Blue wire, Red wire and maybe an Orange wire. The Red wire is low spped, Orange is Med-Low and Blue is Medium. Look on the circuit board and see what colors are on "Park" and what color is on "Load" or "Line". Swap that wire to what ever speed you want. Remember that increased speed will make the air from the registers a little cooler.

Nov 05, 2007 | Goodman GDS80904BNA Open Flame Heater

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