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 isn't on because it's also charged by the can that's 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 didn't loose 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 don't think there is time for the cooling coil to become frosted and it's not that hot today.
Sunday, July 1st, 2012 AT 6:15 PM