Arrived onsite for ac maintenance on 1 system. Turn AC on to confirm operation. Checked all electrical, measured pressures for R22 at 66/212psi with 6 degree sub cooling with outside temperature at 70 degrees. Measured temperature drop at 22 degrees. Cleaned evaporator coil and blew out condensate line. System running as it should. Recommend upgrading system based on age and phased out refrigerant.
