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Old 08-02-2012, 09:53 PM   #1
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I have a mobile home and the led on the HVAC blower keeps tripping the light to show reversed polarity. I turn it off it is good for a while and then it happens again. Is this a sign the board is going out? I am sure I could find a replacement for it if it is but I need to know how to diagnose it first.

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Old 08-02-2012, 09:54 PM   #2
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check polarity

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Old 08-02-2012, 10:14 PM   #3
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are you sure the code you are seeing is for polarity reversed? If not new furnace and no work has been done lately this would not be a common problem. Once you reset board by turning off and on if polarity was reversed it would remain reversed. Check code again and unless you have a power supply issue I would think the board is acting up.
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Old 08-03-2012, 12:20 AM   #4
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Need to reverse your line voltage to your furnace. Should fix the problem.
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Old 08-03-2012, 08:16 AM   #5
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Is this a new issue, has this system been working properly for some time before?
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