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Old 11-06-2010, 01:34 PM   #1
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TRANE 90 xe High Limit Error -still....


Hi my LP furnace is mounted horizontally under a crawl space, fan blows, no fire, 4 LED flashes so I replaced the high limit switch and the filter. Still 4 flashes (high limit switch) and no fire. Also checked the condensate drains.
I am starting to think the board is shot, anyone have ideas of other things I can check.
Appreciate any ideas.

Thanks
Bruce
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Old 11-06-2010, 03:48 PM   #2
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TRANE 90 xe High Limit Error -still....


NEvermind, it finally must have reset the high limit switch, I re-powered the furnace and it started up with continuos flashses(call for heat) and then fired up. I'll monitor and see how it runs over the next few hours..
Bruce
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