Working on fixing my girlfriend’s 2010 Civic air conditioner.
Of all the material I have gone through to diagnose A/C issues, I have yet to find the same case that I’m running into, as most guides just diagnose with just a given PSI for high or low side. Many guides don’t even acknowledge the effects of ambient temperature.
Not enough cooling (here in Vegas in July it’s already hard to get)
AC Compressor Engages
Low-Side needle was very unstable, while High-Side was stable
System was ~38 on low side, and 200 on high side upon first measurements (in ~105 F), engine brought up to temp
Per mechanic friend’s recommendation: Tried charging the system up to 250 on the high side to see if I could get it there, and I did successfully
Low side needle still highly unstable (rapid shaking and also varied what it was centered around between 50-60 psi)
Friend’s Suggestion: Probably a leak somewhere in the system and/or a clogged expansion valve.
Waiting to look at the car again to check the UV dye I put into the system and look for leaks.
- This topic was modified 1 year ago by G A.
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