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wildbyon's avatar
wildbyon
Explorer
Jan 13, 2015

Furnace Burner

The burner on my furnace is cycling on and off? Also, it seems like a lot of heat is being vented out the side? Anyone have any ideas?
  • Another thing you referred to is heating up! When the unit is cold the air will pass over the heat exchanger, being the unit is cold the heat exchanger cools off and the fan will stop. Furnace reheats and fan comes back on , this will contuine till the RV is heated up and will take a while depending on how cold it is inside and outside. Should the burner be cutting on/off blocked vents are a common cause or varmits built a nest in the ducts or never hooked up.
    Make sure all vents are clear, and there is no filter in the furnace.
  • wildbyon wrote:
    Thanks for the replys...it sounds to me like this may be my problem...

    "Furnace is 'limiting' (caused by high limit switch operating due to lack of air flow, high gas pressure or faulty limit switch)"

    Probably isn't something I can fix, so I'll get a furnace guy to check it out.


    that high limit is a piece of cake to swap out and a $10 part. You can do it in about 10 minutes. Take the front cover off of the furnace and it's right there in front of you.
  • 0rion wrote:
    wildbyon wrote:
    Thanks for the replys...it sounds to me like this may be my problem...

    "Furnace is 'limiting' (caused by high limit switch operating due to lack of air flow, high gas pressure or faulty limit switch)"

    Probably isn't something I can fix, so I'll get a furnace guy to check it out.


    that high limit is a piece of cake to swap out and a $10 part. You can do it in about 10 minutes. Take the front cover off of the furnace and it's right there in front of you.


    Depends on Brand/Model as some limit switches are on back of heat exchanger requiring pulling it out to access.

    OP hasn't provided which furnace it is,