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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My furnace will only stay on if I leave the top cover off I

Customer Question

My furnace will only stay on if I leave the top cover off
I was thinking it has something to do with the fresh air in take
The pee trap was full but I cleaned that out and it still does it
When it goes off it sometimes throws a code of pressure switch open. I had them check and they show they are ok
If I put the lid back on it will run for two hours and then shut off
Right now leave lid off furnace closet open and window open
Not a good solution
Submitted: 1 year ago.
Category: HVAC
Expert:  Daniel Plourde replied 1 year ago.

hi i am dan i can help you with this. have you checked to make sure the intake pipe is not blocked or clogged?

Customer: replied 1 year ago.
when I go outside I can feel the air . It vents on the side of the house
I didn't snake it
Customer: replied 1 year ago.
I put a bag in the pipe right inside the furnace to try to get in to shut off to see if it would but it didn't
I did it for 5 mins
Expert:  Daniel Plourde replied 1 year ago.

you said it runs for 2 hours and then shuts off. does it do that every time or does it turn off sooner sometimes

Expert:  Daniel Plourde replied 1 year ago.

sorry i did not get the request for a phone call erlier. if you would still like a phone call just request it again or we can continue on here.