Trane xv80 help needed

Old 02-02-14, 01:58 PM
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Trane xv80 help needed

i have a trane xv80 (model # TDD100R9V5E0) that stopped kicking on the pilot last night. i noticed yesterday it was blowing cold air so i pulled the cover which tripped the switch and shut it down....after i put the cover back on the system started up and i could see the pilot come on and it would blow heat.

so i happened again last night before bed and i was able to get it to shut off, then come back on and blow heat. when i got up early this morning to feed the little 16 month old monster....only cold air again, so i tried the reset and the pilot refused to kick on this time. many restarts and gas shut off for a while and back on and still nothing.

i am getting 9 blinks on the red led which mean "check ignitor", but I am not sure what to check on is cold and the wife is getting pissy

i have a short 30 second video of what happens on startup with the noises and led's if it will help you diagnose.
Old 02-02-14, 02:52 PM
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If it is the igniter, it will need to be replaced. It appears to be somewhat buried. It is held in place by two screws. If you want to work on it yourself, be sure that you have the main power to the furnace shut off and do not touch the igniter surface with your fingers. It is fragile and also will burn out quickly if body oils contaminate it. Disconnect the electric to the igniter by the plug only. Do not pull on the wiring.
Old 02-02-14, 02:54 PM
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Welcome to the forums.

A pilot ?? Do you mean the burner. I don't think the XV-80 uses a pilot.

A trouble code of 9 blinks can be a poor ground or a differential between the 24vac neutral and ground or a defective igniter.

If you no longer see the igniter come on.... it is probably defective. You can carefully remove it and look at it. They are fragile and will crack if it gets hit. You are looking for a black/white spot on the ceramic part.

The pic below is not your igniter but it shows what to look for.

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