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  1. #1
    Join Date
    Mar 2012
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    dual fuel system, heat pump with propane furnace aux backup, dust burning smell

    i recently installed new heat pump early this year, my 92% condensing propane furnace is 8 years old.
    it seems like everytime after running heat pump and then switch back to propane furnace first time, there is a dust burning smell for initial few minutes, and if next cycle is propane furnace, then no dust burning smell
    and switching back from furnace to heat pump no dust smell either.

    is this normal? or furnace or other component need service?

    i normally change 3m air filter once every 3 months usage.

  2. #2
    Join Date
    Mar 2013
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    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary, or ask questions of the OP here.

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    Last edited by beenthere; 03-17-2013 at 06:15 AM. Reason: Non Pro * Member

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