I have this A/C system mystery. I have a new four seasons compressor, the system held 29 inches hg. I put 3 cans of R134 into the system. The compressor cycled alot and finally quit. I bypassed the low pressure switch and the compressor runs so the low pressure switch is good as is the A/C clutch thermal switch. I also checked the diode in the plug wiring for the compressor. I mention all these to eliminate extra questions.
I hooked the vac pump back up to the system and it holds 29 inches. How the heck can the system eat three cans of R134 leaving the system at 0 psi and then hold vacuum. This makes no sense at all to me, any seen this before?