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Trane Furnace xv-80

My furnace is a Trane xv-80.. im getting a 3 flash Diagnostic code witch says Pressure switch error now . I had someone come and look at it and he said i need a new Ciruit Board that would coast $690. i found it on line for $329.99 ....

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  • bobolson9110 Jan 26, 2009

    I had the same problem, called for service, tech. said probably a little dirt in collector box ( rubber hose goes from switch to inlet on said box) tech inserted a small wire and ran it back and forth, in the inlet to the collector box said he felt a little resistance but all shoud be fixed. $125.00 later furnace was running

  • dwkcool May 11, 2010

    if it comes up pressure switch start there first, the pressure switch is the round disk with the rubber hose going to it with two wires most of the time orange


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Check the pressue switch and make sure that nothing is in the fan that would cause it to not draw. I have seen water inside of them at times due to the high efficentcy of the units. let me know if this does not solve it please.

Posted on Jan 01, 2009

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