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Tripler · 08-07-2020

Did you also pressure test the system with nitrogen for a 1/2 hr or so ? And flush the system with nitrogen before adding 134a ? There could still be moisture in the system even tho you put a vacuum on the system to pull the moisture out . This is what I did on residential .
Oh and also , when assembling connections , did you use a bit of refrigerant oil or vacuum pump oil to lube the connections ? That's important for a good seal because of aluminum binding against itself , even the brass connections will need lube .

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08-07-2020	#3
Tripler Join Date: Apr 2013 Location: Toronto Posts: 716	Re: Need some A/C help Did you also pressure test the system with nitrogen for a 1/2 hr or so ? And flush the system with nitrogen before adding 134a ? There could still be moisture in the system even tho you put a vacuum on the system to pull the moisture out . This is what I did on residential . Oh and also , when assembling connections , did you use a bit of refrigerant oil or vacuum pump oil to lube the connections ? That's important for a good seal because of aluminum binding against itself , even the brass connections will need lube . Sent from my SM-A205W using Tapatalk Last edited by Tripler; 08-07-2020 at 06:59 PM.