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donaldrfiske

Cab ac works sporadically

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06 holiday rambler 330 Cummings  ac cab unit cools sporadically some times it cools great other times it blows warm air any suggestions

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 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.

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