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    tonydar's Avatar
    tonydar Posts: 3, Reputation: 3
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    #1

    May 17, 2010, 05:33 PM
    Goodman furnace troubleshooting
    Goodman 95% 2 stage furnace. LED code says pressure switch is stuck open.
    1) Changed switch.
    2) Jumped Limit switch.
    3) Changed PCB.
    Same error code. 3 blinks "code says pressure switch is stuck open"
    Can You Guide me further
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    May 17, 2010, 05:37 PM

    It has 2 pressure switches? Did you blow threw the tubes to get any moisture out?
    Did you check to see if the vent was clear?
    tonydar's Avatar
    tonydar Posts: 3, Reputation: 3
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    #3

    May 18, 2010, 04:34 AM
    Quote Originally Posted by Joshdta View Post
    it has 2 pressure switches? did you blow threw the tubes to get any moisture out?
    Did you check to see if the vent was clear?
    Thanks Josh,
    Yes, I checked and replaced both. Also I blew through the tubes. The furnace was 1 of 4 systems in this development and start up was for the first time yesterday.

    Today I am going back to check to see if I have 24v going from pin 2 on the connector traveling to my PS.

    Any other ideas let me know. I'll post my outcome tonight.
    tonydar's Avatar
    tonydar Posts: 3, Reputation: 3
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    #4

    May 19, 2010, 05:41 PM
    Quote Originally Posted by Joshdta View Post
    it has 2 pressure switches? did you blow threw the tubes to get any moisture out?
    Did you check to see if the vent was clear?
    Hey Josh,
    Fixed problem. Exhaust vent had been crushed by another trade and hidden behind blown insulation.
    Talk soon. Tony
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