Your Trailblazer is around 13 years old. If the A/C system has never been serviced, it's probable that the insufficient cooling issue you're experiencing is due to a low refrigerant charge. As already mentioned, you can't determine the refrigerant amount by pressures. What's needed is to recover the...

Okay...we've zeroed-in on the oil amount. Great! Both Old Air (7 ounces of PAG 46) and Tim (220 cc or 7.4 ounces) are very close. I would go with what Tim said for a slight bit more oil, which IMHO won't hurt anything. Also, drain and refill the compressor once, as Old Air suggested. Based on the ne...

John TY for the help, I have not found what is the proper oil and capacity for the compressor Pro6Ten, A6 copy, using 134A I have look but not in the specs I looked at. I can't find that oil spec, either. But I would bet it holds the same amount as the GM A-6...10-11 ounces. You could try calling O...

Corvettes aren't known for outstanding A/C performance, at least the front-engine models. I don't know about the 2020-on mid-engine cars. So IMHO, 47 degrees at the center vent on a hot day seems pretty good.

JohnHere, Many thanks for such detailed answers to my many questions. Unfortunately it is too late to take action on most issues, since in my Civic there is no easy access to many of the AC components, including the compressor. But I'll make sure that the pressures are in spec and that there are no...

Installed Ester oil 3 oz in compressor, 2 ounces in Dryer, 1 ounce in condenser 1 ounce in evaporator Oil amount and distribution sound correct. Not that it won't work, but I'm curious why you decided on ester oil instead of PAG. New equipment/ hoses/Flushed, Dried and Vac. Blew shop air through al...

I use a product called Pittstop to estimate the quantity of oil in the AC system. I've never used Pittstop and have concerns about its accuracy. Others might disagree, but I feel much more comfortable doing it the old-fashioned way, starting with a completely empty system, then physically adding th...

Just to clarify, the OT should be installed with the larger screened end toward the condenser and the opposite end with the actual orifice inside (usually a short brass tube) toward the evaporator. If installed backwards, the o-rings won't be in the right place, which could explain the looseness of ...

I got from what was said I should do the following 1) drain compressor and flush several times with proper PAG oil, which is correct an Old Air"Pro6Ten" 2) all new items need not be flushed 3) POA looked at? it was 2 years old when I plugged it and tape up for the 2 years To clarify, if t...

You are correct in that the specs for your vehicle call for 5 fluid ounces of oil, PAG-46 in this instance. Additionally, 18 ounces net weight of R-134a are required for a full charge. That being said, it's difficult to judge whether the one ounce of oil you drained from the original compressor shou...