Need help, no power going to ac compressor (evo 8)
Jul 15, 2019, 06:48 PM
#16
EvoM Community Team Leader
Jul 15, 2019, 11:58 PM
#18
Evolving Member
A completely vacuumed system won't show all leaks. I've had HVAC systems hold max vac for hours without going down, yet they'd start losing refrigerant at like 20-30 psi.
It's still a good idea to check for leaks during the vacuum portion, but you won't know the system is leak-free until you fill the system with R134 and spray soapy water on the connections. If you don't want to waste/leak freon into the atmosphere you can also use an inert gas such as argon for leak testing.
It's still a good idea to check for leaks during the vacuum portion, but you won't know the system is leak-free until you fill the system with R134 and spray soapy water on the connections. If you don't want to waste/leak freon into the atmosphere you can also use an inert gas such as argon for leak testing.
Jul 16, 2019, 07:56 AM
#20
EvoM Community Team Leader
no, they aren't, but if you can't hold vacuum you for sure are leaking. You shouldn't even attempt to pressurize the system if it won't hold a vacuum.
If this was my car I would just assume a leak and replace all the o-rings and inspect all the pieces for damage/failure.
If this was my car I would just assume a leak and replace all the o-rings and inspect all the pieces for damage/failure.
Last edited by Biggiesacks; Jul 16, 2019 at 08:02 AM.
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Fox_IX (Jul 16, 2019)
