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Old 12-19-2008, 03:23 AM   #16
An old Tradesmen
 
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Problem with Trane gas furnace


Could be either.
Many blowers run at one speed in auto, and another in "on".
So the speed winding used in auto could be bad, but not the speed winding used in "on".

Use a meter to see if your control board is supply power to both output terminals.
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Old 12-19-2008, 03:12 PM   #17
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Problem with Trane gas furnace


Quote:
Originally Posted by SKIP4661 View Post
What's the resistance reading of the ignitor?
One ignitor shows 60 ohms, the other 100. Both are having trouble.
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Old 12-22-2008, 01:12 PM   #18
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Problem with Trane gas furnace


I have the exact same problem with mine. Fires perfect when cold but not when warm and all other criteria you listed are the same.
Any other thoughts on this? I am about to call the pro's.
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