The car has a compressor that is 5 years old, and brand-new condenser and all new lines. The evaporator is original. Pressures are normal except the high side climbs up until the switch kicks it off and it will short cycle 3 or 4 times until it runs for 2 minutes and then it will short cycle again. After 30 minutes of running, the compressor does not short cycle and pressure on the high side rests around 250 psi, and the air temperature is good, and everything works normally. I'm starting to think it may be an engine performance or throttle issue. Seems like when the fan turns on, the rpms drop to 600 and the compressor turns off, jumping the rpms to 800 and then it turns on. By the 4th time, the compressor stays on around 650 rpm. Normal idle with the compressor running is about 800 rpm. Also, if I rev the engine the rpms will return down to 600 where the compressor will shut off, and I can effectively make this scenario happen whenever I want.
I'm thinking there may be too much oil in the system, or a weak fan motor, what do you guys think?
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Wednesday, May 24th, 2023 AT 9:48 AM