Smells bad. Parked in NW Arkansas humidity is in the mid 80s. Temp mid 80s. When I run the ac units to cool down it is pulling the gases from the vent tank into the coach. Never have had an issue lik...
If it is that "wet dog" small when starting the roof A/C, you need to clean your EVAPORATOR.
Get an evaporator cleaner at any box or HVAC supply store. Cleaning is done from the roof after removing the A/C cover and then the evaporator cover. Be sure to block the opening to the coach interior.
You will be SHOCKED at what you find-- dirt, mold, mildew!