My coach is about 2 years old and the black plastic covers for my AC are really showing their age with white streaks and just generally looking dull. So today I decided to clean then up, and also inspect the guts up top. Especially my rear bedroom unit since it makes an annoying buzz when it runs.
I get up top and take the covers off. Since it's so hot I decided to restore them with "Black Again" treatment in the garage out of the sun. I assume this is the same stuff as "Back to Black" from Mothers. The stuff worked great and although the middle AC didn't clean up as well as I'd have liked, it looks 1000% better than before.
I also figured out what the buzz was. A small capillary tube was lying in direct contact with another copper line. And it vibrated when running. I gently bent the tubes apart, and no more buzzing. See the first set of pics. The rest are of the covers before and after restoration.
2015 Fleetwood Discovery 40G
2014 CRV w/EZ Tow
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