Re: AC resurrect - costly mistake
You can't leave a vacuum pump on too long, especially if the system has been open to the atmosfere for any length of time durring humid or rainy conditions. You can leave the pump on it over night, and heat also helps evaperate the moisture from the system. You can place a drop light next to the compresor to keep it & the oil warm and this will help drive the moisture out.
Gary
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