Posted 7/1/2009 19:24 (#762763 - in reply to #762638) Subject: Re: How long do you leave the vacuum pump on the a.c. unit?
Texas/New Mexico Stateline
Pretty much agree with the others, I hardly ever pull vacuum for more than 30 minutes. If I'm in a big hurry about 10 minutes after the vacuum stops dropping. Also I have never seen a small leak show up on the vacuum gauge. If it shows up on there it is a bad leak. Therefore if I know the system is in good shape, I don't wait to watch the gauges. Suck out the air, fill it, and get back to work.
How long do you leave the vacuum pump on the a.c. unit?
