Diagnostic Service Call on 2002 Ruud Air Conditioner. Service work performed: Here for a no cool on 18 yr old AC system. System has been freezing up recently. On arrival I checked filter and it is clean. Made sure both indoor blowers were coming on.(twinned furnaces) Checked refrigerant charge and found it slightly under charged. Running at a 40° superheat. Added 2 lbs. 2 oz. of R22 to achieve a 18° superheat. Advised customer there is likely a leak in the system. Just wanted to charge it up for now.
