donaldrfiske Report post Posted July 29, 2020 06 holiday rambler 330 Cummings ac cab unit cools sporadically some times it cools great other times it blows warm air any suggestions Share this post Link to post Share on other sites
rayin Report post Posted July 29, 2020 First do the free checks. Is the heater hose hot on the inlet side, ambient temperature on outlet? Is the vacuum pump operating OK? Inspect the vacuum tubing and canister for leakage, and air deflector doors for proper operation. If those are all OK, you are free to begin spending money. Actully, my EWAG is the system is low on refrigerant. Over the years some refrigerant will eventually leak out, if adding(correct type) refrigerant doesn't fix the problem, it's time to hire a professional auto A/C tech. Share this post Link to post Share on other sites
donaldrfiske Report post Posted July 30, 2020 Ok thanks will check those things this week end Share this post Link to post Share on other sites
