Ro646a wrote:
Freezing temps at night.
The mobile tech went through all the air components when be was here. They are pretty confident that I need a compressor.
My greatest fear is my RV getting damaged by towing. The other concern is time. Nobody so far can fit it into their schedule.
For decades most trucks have had air dryers from factory. If they are maintained, airline freeze-up is not a issue. In the years before I retired I noticed a large percentage of pro drivers did not understand opening valves in the bottom of the tank to check for moisture buildup is a good idea. Bet most RVers never knew. There is a good chance, IMHO, that a tech from the south has never dealt with a system freezing up.
The outside temp can be well above freezing, and ice still form where air moves from high to lower pressure.
Look at the system. Trace the big air line from compressor to the first tank, it should have a petcock, (Maybe auto drain valve, maybe valve with lanyard) Use your propane torch, heat that tank near that valve until you can touch, but can't hold with bare hand. Open the drain (If auto, may need to remove. If you have pressure in tank unscrew part way to let it leak. Don't let it hit you if it blasts out.) If you don't get any water out, then I might think about a bad compressor.