Yesterday the compressor started working again and I could tell the true pressure. The gauge I was using has a high pressure when the compressor is not on because it was also charged by the can that is connected. I found there was only around 10 lbs of refrigerant so I added a fair amount. When I ran out the system was around 30-35 pounds and only 5-10 lbs below the optimal charge for the temperature.
Even with the new refrigerant, the system ran for a minute and then the compressor started cycling on and off rapidly, spinning up and stopping once full speed was reached. I tried to see if driving would help as the engine speed seemed to be affected. After driving two miles I heard what sounded to be a long release of air, similar to a truck with air brakes. I shut the AC down until today.
Today the compressor ran fine for the first minute then started cycling again. I was able to ascertain the refrigerant pressure is at 25 lbs so apparently I did not lose much yesterday.
I understand a mechanic will need to fix the leak, but I need to save every penny possible. Can I continue to diagnose the compressor? Is there a switch controlling the compressor that may have failed? I do not think there is time for the cooling coil to become frosted and it is not that hot today.
Tuesday, July 31st, 2018 AT 6:57 PM