First, the backstory: I keep my 2014 Arctic Fox 22H plugged into 30 amp at my house, and have since it was new. Here in South Texas, the A/C runs pretty much all the time from April-September. The last several days I've had a strange chemical smell inside. At first I thought it might be a tube of glue or epoxy that had burst, as I carry them with me for emergencies. But I've sorted through them, and haven't found anything amiss. Or it might be an electrical smell...don't know. Also, a month ago I installed a MicroAir EasyStart on the A/C (works brilliantly) though I don't think that's the issue. Anyone have a hint?

Is it an ammonia type smell? Check the fridge.Is it a "rotten egg" type smell? Check the battery bank.

When was last time you checked battery water levels and had to add water (distilled)?

Wondering if you have a mold issue in your AC?

The above posts pretty well have identified the potential sources.Let us now what you find. From a safety standpoint, I would start with batteries-- verify that the case(s) are not swollen, water level is correct, no cell dry.

Strange acrid smell coming from what...air conditioner?

ksg5000
Explorer
May 20, 2018
Go up top and inspect the capacitors.
wolfe10
Explorer
May 20, 2018
A commercial evaporator cleaner will "play nicer" with the coils than chlorine.

Any box store should have it.
MEXICOWANDERER
Explorer
May 20, 2018
Mold and bleach react similar to garden slugs and salt. Dilute the bleach ten to one. Spray on the evaporator. Soak it. Wait 15 minutes then flush with water.
garyemunson
Explorer II
May 20, 2018
I had a smell from the fridge that I would describe as 'acrid'. It was a hot paint smell caused by the sensor for the outside cooling fin fans going bad and the 2 fans not running. $10 on eBay and easily accessible through the top vent. Fridges mounted in slides have to have a fan as they cannot utilize through a roof vent convection cooling.
ScottG
Nomad
May 20, 2018
You might try a coil cleaner (avail. at HW stores) or even Simple Green on the coils to freshen them up.
Damdifino
Explorer
May 19, 2018
Thanks for the assistance, y'all. In the meantime I opened it up from inside the coach and vacuumed the fins, which had scary globs of something on them. My wife just stepped in and said, "Oh, it smells like an air freshener in here." That's a good sign. (Ergo, I suspect mold.)
Jack_Diane_Free
Explorer
May 19, 2018
Could it be a dead critter decomp somewhere?
wolfe10
Explorer
May 19, 2018
The above posts pretty well have identified the potential sources.

Let us now what you find.

From a safety standpoint, I would start with batteries-- verify that the case(s) are not swollen, water level is correct, no cell dry.
2oldman
Explorer II
May 19, 2018
Black tank?
SidecarFlip
Explorer III
May 19, 2018
Wondering if you have a mold issue in your AC?