What could be wrong with this RV heater?

Discussion in 'General Home Improvement Discussion' started by farmerjohn1324, Dec 14, 2017.

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  1. Dec 14, 2017 #1

    farmerjohn1324

    farmerjohn1324

    farmerjohn1324

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    When the heater is turned on, it makes a knocking sound that is loudest from this hole on the outside. The heater is turned on from a thermostat inside.

    What is the opening?

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  2. Dec 14, 2017 #2

    nealtw

    nealtw

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    Metal parts expanding in heat??????????????
     
  3. Dec 14, 2017 #3

    maxdad118

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    Looks like intake and exhaust, like Neal said, could be expansion and contraction. Check any screws you can access and snug them up. What kind of noise? Can you describe it? When running, the lower opening, most likely, is intake for combustion air. Upper opening is exhaust and you should feel heat from it when on?
     
    Last edited: Dec 14, 2017
  4. Dec 15, 2017 #4

    JoeD

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    What kind of noise? Could be a broken fan blade or something stuck in the fan.
     
  5. Dec 15, 2017 #5

    farmerjohn1324

    farmerjohn1324

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    A "knocking" is the best way I can describe.

    I'm having an RV professional look at it next week.
     
    nealtw and JoeD like this.
  6. Dec 15, 2017 #6

    havasu

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    If this happens just after the heater is fired up, my guess is there is a metal expanding going on. Does it stop after it has heated up, or just continues?
     

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