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  1. #1
    Join Date
    Nov 2005
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    I have an older reznor unit heater. when burner ignites fan begins to slowly cycle on off. the time between the on gets smaller until the fan runs only on. when i turn tstat way down, it is opposite. cycles on off quickly then gradually gets slower until completely off. fan control switch?

  2. #2
    Join Date
    Oct 2005
    Fairfax, VA
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    Yes and no. The fan switch controls the fan according to temperature, but the reason it's acting like that could be due to various things being wrong. Only an on-site inspection and testing will tell, by someone who knows what's normal.

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