HAd the same issue....blowing hot air.
Took unit to RV service center. They checked it out and said it was a leaking Shrader valve. Replaced it, re-charged and it worked fine.
Now I have a different issue. Just returned from Colorado. Dash air is blowing cold air, BUT....it stops blowing upon acceleration or when RPM is 2,205 rpm or above. When going slow, less than 40 mph, it works.
Does anyone know if the Evans Tempcon dash unit in anyway uses a vacuum air system to activate the AC fan unit?
Pete and Patty
2010 Georgetown 378TS; 2012 4dr Jeep Rubicon
1 Yellow Lab (hers);1 Little Bitty dog (mine)