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Furnace blows cold air, ignitor won't glow.

I have 2 red led flashestwice when I power up my trane xv90 furnace, then I get 3 red flashes & then 2 red flashes again & then the green led flashes slowly. The draft inducer motor comes on but the ignitor don't glow. After 3 attempts from the draft inducer, the blower fan comes on & just blows cold air into my ducts & out of the air vents. I set the thermostat from 68 to 72 but it still just blows cold air & the air is constant & don't stop until I turn off the furnace main power switch. The 2 red led flashes indicate a lockout, but how do I reset it to get it out of the lock out mode ? The 3 red led flashes say that the pressure switches may be faulty, but I checked them & they test o.k. & i cleaned out all of the ports where the tubes connect to the switches & draft motor. Please respond, Thank you. Jan Schwartz

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  • Anonymous May 02, 2009

    I have the same problem. Have you found a solution?

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  • Master
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Ok this is going to sound funny but it seems as though the polarity is reversed going into your furnance. to correct this proiblem you first need to unplug the unit and where the cord goes into the furnance at that connection disconnect the two wires. Once theses are disconnected switch the wires .All you are doing is reversing the way the electricity flows into the circut board. I would wager that is the problem

Posted on Apr 16, 2009

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Error code= two red flashes, lockout/ no flame


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