Performed two system air-conditioning maintenance one system from 2023 are install is working perfectly that one controls the master bedroom. The opposite system is from 2002. It has a rusting evaporator coil and the compressor is beginning to read caution/bad alter let homeowner know that that system is beginning to near its end of life Replaced the 2002 systems disconnected because whenever I turn the power back on the disconnect was no longer passing power after repairs were made system is functioning turning on and off and cooling