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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have Trance XV90, 2 stage. I had 4 red blinks. I Bypassed

Customer Question

I have Trance XV90, 2 stage. I had 4 red blinks. I Bypassed the pressure switch, now I have 3 blinks. Motor starts, I can see orange and then blue flame but then shuts off. Trane XV90.
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: 4 hours
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: I can pay for online live help.
Submitted: 2 months ago.
Category: HVAC
Customer: replied 2 months ago.
It is working now. I had to disconnect the intake pipe. There is no visible icing on it, tough. But apparently it is still causing problem
Expert:  airheatman replied 2 months ago.

Make sure there is nothing blocking vent outside. Snow? Even a spider web or dirt dauber is enough to effect pressure on switch.Also make sure no water is standing in drain tubes or line outside.If drain freezes or blocks will cause same issues