Question about Dometic Rooftop RV Air Conditioner

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How do you fix smelly air conditioner?

Bad smell comes out when air conditioner is on, but not the fan.

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My rv sometime gets the odor of sewer gas picking it up off vents on roof

Posted on Aug 18, 2015


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Posted on Jan 02, 2017

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SOURCE: odor when air conditioner turned on

Hi, If its a smell other then electrical burning, I would say it is coming from the evaporator coil inside. Take out the filter and clean it if it is the washable type and try and clean the coil. They make coil cleaner you may be able to get at your RV dealer to do this. This is the only thing I can think of that would have any odor. Unless there is something outside it is drawing in. The system is sealed and would not emit any odors other then a hot motor. You can check up top by removing cover to check the motors and to see if any critters have crawled inside. Let me no, keep me posed on what you find and if you need more help.
PS Check the indoor blower motor also, it may be getting hot and ready to fail.

Posted on Feb 22, 2010

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SOURCE: we have a mold and mildew smell coming from our

You can shut off breaker to the unit and go on roof and remove cover to do a visual check under cover in drip pan etc, as well as shine a flashlight in where filter at ceiling goes to look at coils and fins (way up inside) for any sign of mold etc. The hard part here is that I am going to assume it is a ducted system, and we can't be sure the mold smell isn't coming from the ductwork. Hopefully you"ll see something when cover on roof is removed.
How old is the trailer?

Posted on Aug 17, 2011

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