POST 1 / ORIGINAL POSTEROriginal post
Having a little problem bleeding my coolant system. Do you do it AC on or off, or does it matter?
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YOUR RESEARCHBleed coolant with AC on or off?
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POST 2Original post
cant see how the AC would matter? I have not done this at home, what is the prescibed method (at the shop we pull a vacuum on the system and them "suck" in fluid
POST 3Original post
Shouldn't matter. The Boxster shop manual doesn't mention the A/C at all when flushing or bleeding air. It does mention making sure the heater is on when draining but doesn't mention it for bleeding. Though it probably is a good idea to make sure coolant is flowing everywhere that it can and I don't see any harm in having it on when bleeding air from the system
POST 4Original post
just follow the instrctions on the can.. Thats what I did and my AC is now good to go. I bought a can with the little gauge on it also..
POST 5Original post
Sorry.. mis-took your Coolant for refridgerant. My bad... never mind above post
POST 6Original post
Quotes source post: 7815122
Off. If the A/C is on the radiator fans run all the time and the coolant will not get as hot as it would otherwise. When you hear the fans come on the coolant temperature is 212F (this number varies a bit depending upon the source) and when the fans go off the temperature has dropped to 205F. You want to get the coolant hot to open up the t-stat as wide as possible to pump the coolant through the system with sufficient force to remove all the air pockets in the cooling system. Sincerely, Macster.
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