Carrier Furnace Plugged secondary?

Discussion in 'HVAC Heating & Cooling' started by plumber69, Jan 21, 2019.

  1. plumber69

    plumber69 In the Trades

    Joined:
    Jun 20, 2014
    Location:
    Prince Rupert, British Columbia
    58MVP100-20* What would cause this to the secondary heat exchanger. I believe the unit is 8-12 years old.
     
  2. plumber69

    plumber69 In the Trades

    Joined:
    Jun 20, 2014
    Location:
    Prince Rupert, British Columbia
     

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  4. Stuff

    Stuff Well-Known Member

    Joined:
    Mar 7, 2013
    Location:
    Pennsylvania
    Running propane with wrong orifice? Burners mis-adjusted/overfiring?
     
  5. Dana

    Dana In the trades

    Joined:
    Jan 14, 2009
    Location:
    01609
    What Stuff said- most likely running with insufficient excess combustion air. With condensing burners they can't use too much excess or it will lower the dew point of the exhaust for less combustion. But running without enough can result in soot clogging.
     
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