Forum Discussion

mrad's avatar
mrad
Explorer II
Oct 22, 2020

Humming sound in 5th wheel??

Last week we picked up our 2015 5h wheel from a dealer. They took us through a walkthrough and explained how things work. We left the dealership and headed straight for a campground. The next morning when it was quiet, we noticed a humming noise. We cannot figure out where the sound is coming from. We did not notice it during the walkthrough, but that could have been because of the noise. The fireplace sits towards the front right by where the steps are to walk up to the bedroom. We can hear the sound in the 5th wheel as well as in the pass-through storage. Any ideas on what could be causing this? We never noticed this sound on our TT. This coach does have a residential fridge that sits farther back in the living space, but the sound is not coming from the fridge.
  • RobWNY's avatar
    RobWNY
    Explorer
    Oct 22, 2020
    It could be a number of things. I would check that your water pump isn't running constantly. Easy to check. If it's on, turn it off. If the humming stops, that's the issue. It could also be the converter fan. Unplug from campground power and undo the battery disconnect. If the humming stops, it's the converter cooling fan making the noise. It could also be the fireplace motor. To check this, turn it off. If the noise stops, that's the culprit.
  • wing_zealot's avatar
    wing_zealot
    Explorer
    Oct 22, 2020
    More than likely the fan on your converter. The hum will change depending on the load on the converter at any particular point in time.

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