Goodman Heating & Cooling - Popular Questions, Answers, Tips & Manuals

Is the hole on the outside unit. If may be to stop the condensate drain pipe from freezing on the elbow. Google Goodman (model) installation manual https://www.google.com/search?q=%E2%80%8BGoodman+(model)+installation+manual ..

Check here...page 8https://www.theacoutlet.com/documents/Installation-Guide-Goodman-MBVC.pdfwoops you"ll have to copy and paste the link ):

Maybe ck here... https://www.youtube.com/watch?v=QvRur9MP3Cg

https://hvac-boss.com/troubleshooting/goodman-furnace-error-codes/ According to this page, you can usually fix this 4 blink diagnosed problem by changing the air filter or tightening wiring (which it has a cautionary warning about tightening such too much) and checking the flue for blockage. The furnace has activated the primary open limit circuit. Here is a troubleshooting page about the Goodman just blowing cold air: https://temperaturemaster.com/goodman-furnace-troubleshooting/#Goodman_Furnace_Blowing_Cold_Air Poor air flow in the Goodman caused by blockages can result in the tripping of the rollover switches which would cause it to blow cold air. That is a safety measure. You don't want gas furnaces burning with insufficient air. Think carbon monoxide. Besides the air filter, the flame sensor or the burner could be dirty. The idea of trying to DYI that cleaning job is rather off putting. I hope changing the filter would work. I trust it is not a fuse in the pilot flame sensor circuit blown. A repairman has the voltage testers for checking the electronics involved. I can empathize with this. My furnace, another brand, went out recently. The repair man didn't know why it went out but simply adjusted a handle controlling gas flow to a position slightly different from what was recommended and it worked. All for $200. https://www.repairclinic.com/RepairHelp/Furnace-Repair/36-377--/Goodman-Furnace-Troubleshooting https://www.youtube.com/watch?v=zO1jKqwXu8s https://www.goodmanmfg.com/products/gas-furnaces

thermostat bad or wiring

Power it off for 5 minutes, and then power it back on. Some ideas in the link. https://www.google.com/search?q=Goodman+furnace+blowing+cold+air ..

I have the same problem. The vent flu. Is building up condensation and running back into the furnace and cloggs the little black vent hose with water. Then it comes back on then off etc. somehow the trick is to make as straight of an upward vent flu as possible ( definitely not 45 degree elbows and really not 60's either) seal all connections with glue.

Question edited for typos.Gas furnaces has safety features to prevent explosions. If anything is thought to be faulty, nothing works. All gas appliances must be repaired by a registered gas technician. The two pressure switches are $76 and $29 if you want to risk it.https://www.goodmanparts.net/category/goodman-gmv950905dxa-gas-furnace-oem-repair-partsThere is videos and help here. Check the hose on the pressure switch.https://www.google.com/search?q=Goodman+GMV950905DXA++low+fire+pressure+switch+stuck+open..

the black and white might be swapped it wont show rectafication and flame sensor

Check out the pressure switch .

faulty stat--controller---wire short

Here you go

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possible bad motor

Voltage polarity switch. When the light is blinking six times rapidly, this means the power volt polarity has gotten switched.

How to Troubleshoot a Goodman Furnace With Six Flashes

Videos as well

https://www.google.com/search?q=goodman+furnace+red+light+blinking+6+times ..

I would say bad thermostat or bad relay. It isn't registering the drop in temperature for restart.

bad flame sensor or control board

possible burner tube blockage or flame sensor dirty or bad when fails see if voltage to keep gas valve open

There are two rollout fuses that have a reset button. Watch this video https://www.youtube.com/watch?v=L5U4AUW1hQo https://www.google.com/search?q=Goodman+GCS90793bxa%2C+flashes+6+times ..

That is not good, but repairable, hope you have another source of heat. May require a service call. https://www.furnaceprices.ca/repairs/furnace-repair/goodman-furnace-repair/