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Goodman Furnace that the vent motor turns on an off while still calling for heat. Also when it turns off the thermostat display goes blank. When the vent blower turns back on the thermostat display comes back on. This all happens while the main blower is still running. Also it does not happen all the time. Thamks

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Replace the board.

Posted on Apr 06, 2015

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I Have a beige goodman furnace (old ones) gmp... i replaced the circuit board..it worked fine..then once it reached its desire temprature from thermostat.. fire goes out then 2 min following is the...


Check the pleum high limit switch. Jump this control out and see if the furance runs until the call for heat is satified. Do mot leave the high limit jumperd.

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I turn my thermostat to the HEAT position, I hear the Thermostat click and the Furnace begins to hum but no air comes out of the vents. Also if i turn the fan to the ON position air will come out of the...


need to go to furnace and watch it...if your hearing a hum the enducer draft motor may have failed...it should start first if there is no fault codes...reset unit by unplugging furnace or in some cases turning power switch off...turn thermostat on heat and watch unit ..the small enducer draft motor should start first the a ignitor glows and the should light...goodman units have a control board with a light on control board when it fails should flash a code and on the door or inside on lable should give you what that code is...hope this helps good luck

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Ihave a Goodman GUS075-3 model. Turned the heat on for the first time this year. After abt 5 mins. running it started to smell like it was on fire, the breaker shut off. Now,the pilot keeps going out and...


I would suspect that your fan motor burned out. What I would suggest is wait about 1/2 hour with thermostat turned down to lowest setting where it is not trying to turn furnace on. I would then turn thermostat back up to call for heat and see what happens. Most electric motors have a thermal overload on them and if its on motor will not run until it cools back down. Even if this works I would recommend that you have motor replaced and clean blower. Hope this helps. Thanks

Nov 04, 2010 | Goodman Heating & Cooling

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Thermostat calls and from time to time won't ignite


I would first look at any wire connections both at the furnace and the thermostat. Then I would replace the thermostat. Check the units control board when it does not start for an error code. There should be a small viewing port to look into the furnace cabinet to see the control board.

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

Feb 12, 2010 | Goodman Heating & Cooling

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

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My goodman gas furnace is not kicking on. the light on the unit is saying that it should be working but it is not. there is no pilot light, the fan is working the heat is not


If you are not getting any codes from the board, then the furnace is not getting a call for heat from the thermostat. A wire may have come off, the thermostat not properly wired, or a break in the stat wire. On a call for heat, you should have 24vac between W and C on the circuit board. This will let you know if you are getting a call for heat all the way back to the furnace.

Oct 01, 2009 | Goodman GMS90703BXA Heater

1 Answer

Display is blank and furnace fan stays on


Remove wires at tstat Turn switch for furnace off than on.
touch the red wire to the white to simulate a call for heat.
Or Touhc red green and yellow to simulate a call for cool.
If that works get a new thermostat.

May 10, 2009 | Heating & Cooling

1 Answer

Heat temperature issues with Goodman GMP 100-4 furnace


69,000 btuh is adequate for a 12-1400 square foot house.
Otherwise, your thermostat simply tells the furnace to cycle on/off.
If it calls for heat and does not come on, the problem is with switches and relays within the furnace.
Your setting the temp higher only causes the other parts to keep trying until they finally light and heat.
This is based on your information saying it will cycle on and blow cool air--not hot air.
You will have several temperature variations from floor to ceiling.
You probably have ceiling vents as well.
You need a technician to verify the rollout switches, fan relay, inducer fan etc. if the furnace is not firing everytime you call for heat.

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1 Answer

Heating not working


There could be a number of other potential causes.
1-Ignitor failure
2-vent blockage
3-tripped rollout safety switch
4- tripped limit control
Etc...
Look at the door of the unit for a explaination of the number of flashes of the light. This may get you started in the right direction.

Jan 10, 2009 | Goodman GMS90703BXA Heater

1 Answer

Goodman: My Power Venter (aka Heat and Draft Inducer) won't start


The power ventor most likely needs to be replaced. But be advised. Goodman normally will not sell parts to anyone but a certified technician. I had to show my masters certificate to buy parts from their outlet. This is a part that has a high rate of failure.

Ray

Dec 01, 2008 | Goodman Heating & Cooling

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