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Fan motor vibration - Dometic Rooftop RV Air Conditioner

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Could be motor mount bushings, or bearings going in motor, but another common cause is mud-wasp nests, or other debris on the blades of your condenser fan. You'll need to shut off power at breaker, remove cover on roof unit, and have a look, and clean off as necessary. While power is off try moving motor shaft up and down, side to side, to feel if there is excessive play that may be the cause. This will also allow you to have someone turn unit back on, while you stand back with cover off and observe for possible causes of movement. Turn power back off at breaker for re-install of cover.

Posted on Jul 06, 2010

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Posted on Jan 02, 2017

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