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Old 03-01-2011, 12:45 AM   #1
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furnace problem


Burner burns fine with top cover off but when cover is plaed back on unit burner will burn 20 seconds and go out for 10 seconds and then burn 20 seconds and so on all wires are clear of cover please help

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Old 03-09-2011, 11:24 AM   #2
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furnace problem


cover? enclosed fire box or open? does the controller flash an error code? what type of ignitor? can you see if the flame changes as the cover is installed?

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Old 03-09-2011, 12:21 PM   #3
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furnace problem


2 YouTube videos (see others on right side of main video for more):

This one tells about basics. Get the code (blinking lights from control board) and advise here if these don't help.



This is how to find and clean the thermocouple/flame sensor.
http://www.youtube.com/watch?v=I86jo...eature=related

Before anything, check for obstructions in any venting, dirty filters etc.
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