Found unit low flat on freon r22 evaporator coil completely rusted out customer was not happy because after I called and talked to her on the phone and she was on her way I went ahead and put gauges on unit and she was mad because I touched her unit without her being there but showed her all the pictures and she was the one who let me in to look at the air handler and I went over all problems with air handler and white unit was out of freon but customer was still unhappy