RV furnace vibration is nothing to laugh at. I fixed one furnace that almost rattled the teeth out of my head. If you’re hearing vibration, buzzing, or grinding when your RV forced-air furnace is running, that should be inspected immediately.

Here are the 7 most common sources of RV furnace vibration and noise that I’ve come across. If your reason isn’t on here, let me know!

Broken/Dirty Fan Vanes

Most RV furnaces have a single motor connected to two fans, one at each end: a combustion fan and a blower fan. (These fans are often called “wheels” or “squirrel cages” for their striking resemblances). These fans can be made of metal or plastic.