xr80 won't ignite

Old 04-17-13, 07:59 AM
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xr80 won't ignite

I have an xr80 trane that is having an indicator flash of 5 times. Since my manual says that means flame is sensed when no flame should be present - I took out the flame sensor arm and carefully sanded it with steel wool. I replaced this sensor just a few months ago. Anyway - once I replaced it all clean and shiney it continues to do the following: I turn on the t-stat, then the glow rod comes on bright, the blower comes on and then it just doesn't ignite - so the glow goes off and the blower stays on. It sounds like there is a feeble igniter/spark sound but nothing is happening. Thanks for any advice.
Old 04-17-13, 02:44 PM
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a five flash is usually a false code and a bad control board, but the sequence you speak of should not happen with that fault code.
Old 04-17-13, 08:10 PM
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Describe in order and in detail the sequence of events which occurs whn you turn up the thermostat.

The sequence you describe is likely to be wrong or incomplete.

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