Looked at 3 total systems. 1 system was out on low pressure and found leaky evaporator coil. No warranty on system. Never registered. 2 second was out on high pressure found capacitor completely dead. Replaced capacitor and found high pressure switch was stuck. Bypassed swith and system started cooling. Watched pressures for 20 mins and verified system was not in danger of high pressure. System 3 noticed compressor kicking on and kicking off was going into thermal overload r-22 system. Recommend replacing both system. Comfort advisor is scheduled for today. Will give quote on evap coil