Originally Posted By: The Critic
I had the A/C recharged today for $40.
The system was 1/2 pound low. The system's capacity is 1.5 lbs and I evacuated about 1.07 lbs.
I vacuumed the system for 15 minutes and the gauge was showing about 25 degrees of vaccuum.
Then, I pumped 1.5 pounds of R134A in, started the car, equalized the pressures (which pumps any refrigerant left in the lines back into the car), then ran the system for 10 minutes on MAX recirculate.
The vent temperature, taken by an infared thermometer, showed between 31-33F.
It was 75F today and the A/C was barely blowing cool air. So, I went to O'Reilly's and bought a can of this stuff:
http://www.autobarn.net/interdynamics-350.html
Also purchased an adapter/hose for the can for $15. I added about 1/2 can to the low-pressure side of the system and now the vent temperature is cold. I did not measure the vent temperature, but it seems OK.
I guess I have a leak somewhere?