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Goodman gas furnace getting 3 flashes, stuck pressure switch

14K views 4 replies 4 participants last post by  mortan 
#1 ·
I have a goodman gas furnace and I am getting 3 flashes telling me that my pressure switch is stuck open. how do I fix this?:wink:
 
#4 · (Edited)
check for blocked vent pipes(flue pipe leading up from the furnace could be clogged),clogged hoses(check the hose from the inducer to the pressure switch and make sure it doesnt have a hole in it or a crack) and check the inducer to see if its bad. if the pressure switch isnt closing that means the inducer isnt pulling a vacuum. if you have a multimeter check for 120v from black to ground and white to ground.
 
#5 ·
I have a Goodman model GMNT 080 4B. The furnace start like normal but when the temperature reaches about 64 degrees I receive an error light. The fan continues to run but the burners do not. I have already tried cleaning the flame sensor but the problem continued. Tell me is anyone have any solution..?
 
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