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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Furnace Lite says Pressure Switch Stuck open or Closed,

Customer Question

Furnace Lite says Pressure Switch Stuck open or Closed
JA: Did you check the furnace's filters?
Customer: Furnace Hasn't run in 5years, Had Bad Exhaust
JA: Do you plan on doing the work yourself?
Customer: Yes, got Replacement Fañ, Now Blinking Lite Flashes Saying Pressure Switch is Stuck
JA: Anything else we should know to help you best?
Customer: Comfort maker Furnace, Need Diagram to See Where Hoses From Pressure Switch go, 2 Hose Hookups From Switch, think second Hose hooks to Exhaust Fan?
Submitted: 9 months ago.
Category: HVAC
Expert:  Rick replied 9 months ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. First I’ll need some more info so I have a more complete picture of you situation.

If the exhaust is bad you'll get this error. The exhaust must be properly installed and free of obstructions. I need a model number if you want model specific answers

Customer: replied 9 months ago.
M# *****
Customer: replied 9 months ago.
Don't have P Switch
Expert:  Rick replied 9 months ago.

I'm striking out finding specs for this unit.

Customer: replied 9 months ago.
Havnt Had Much Luck W/Furnace Since
New... Exhaust Motor Ran Constantly
From Severe Weather & Melted Grease
Out of Motor 1st Year. THIS is 3rd
Motor... Burned Wood Last 5 Yrs.
Had Accident & Need Furnace Now.
Had Trouble W/P Switch Before
Expert:  HVAC Guru replied 9 months ago.

Hello and thanks for using this service! If you are a JA Member I would like to personally thank you and welcome you back! I am HVAC Guru an extremely experienced tech on the site and I try to get to as many customers as I can. NOTE it takes time for me to type research and add links so please wait for me to respond back I can only do this so fast. Secondly, I do not know your skill level

Have you checked the pressure switch and tube?

Customer: replied 9 months ago.
Pressure Switch Doesn't Move, Havnt
Looked Down Exhaust Pipe. I'm Very
Mechanically Inclined. Used to Install
Propane Tanks & Systems
Customer: replied 9 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.