Fired up the A/C in my 274VFK for the first time this week. And boy does it make a racket. Previous camper did not have A/C but I'd think that it would be on par with a house window unit as far as noise is concerned. This thing is loud & vibrates the entire camper. Then add the fact that a couple of the roof ducts. Produce a buffeting noise that is just as bad as cracking a window in your car.I'm guessing this is not normal. Any ideas what is going on or items I should check?

Sorry to say it sounds normal to me. Ours isn't ducted and is right in the center of the living area. Makes it hard to even hear tv. We just replaced the a/c as ours died and the new one is a little bit louder than the old one. They claim it's quieter Bxxxxhit.

Atwood used to make relatively quiet A/Cs, but Dometic bought them and put an end to that nonsense. They are all pretty noisy.

Loose bolts,unbalanced fan due to dirt dobber, several reasons for this extra noise

Shouldn't be that way. Do you have wasps that make dirt nests in your area? Probably the reason, they made a nest on one of your fan blades.

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STANG23L

Explorer

Jun 25, 2019

A/C excessive noise/buffeting

Fired up the A/C in my 274VFK for the first time this week. And boy does it make a racket. Previous camper did not have A/C but I'd think that it would be on par with a house window unit as far as noise is concerned.

This thing is loud & vibrates the entire camper. Then add the fact that a couple of the roof ducts. Produce a buffeting noise that is just as bad as cracking a window in your car.

I'm guessing this is not normal. Any ideas what is going on or items I should check?

wa8yxm
Explorer III
Jun 26, 2019
Things I have seen (NOTE that I am not an RV service tech so I've not seen that many A/Cs)

Insect nest on fan blade causing unbalance and vibration (The "Vibrates the entire rig is a clue here) solution Clean fan blades.

Broken fan (The fan by the way is the Condenser fan.. The other one I call a blower)

Cracked Blower Causing rattle (And it was late Friday. hotter than. Well it was hot. and that thing was noisy. NO chance of a new blower till Monday.. I had a spare in my basement. OEM no less Worked out well. I still have a spare left. Won't ever use it less it happens again) this was a neighbor's RV. the other two were my Bedroom unit.

The nest and the broken fan very vibrating. Shook entire RV when the fan blew

The insect next was found in "Spring cleaning" so no problem.

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A/C excessive noise/buffeting

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