Surely your instructor is aware that no meaningful testing can be done at anything below 80F. The reason for this is because at such low temps, no meaningful work is being done by the system. Hi, tbird. Thanks for the response. I did check with my instructor after JohnHere's response, and he is awa...

The low high-side pressure could indicate a compressor problem, but it's very difficult if not impossible to pressure-test and performance-test a system at such low ambient temperatures. I suggest waiting until the ambient temperatures in your area rise to 80°F or above, and then proceed with diagn...

Hi, I have a 2009 Hyundai Elantra GLS and I've been having some issues with my A/C that runs on R-134a. I noticed at the end of last summer that it wasn't blowing as cold as it usually does. I started as a full-time Automotive student at a community college last summer and one of my instructors (ASE...