Customer called for no air conditioning. Customer stated that the condensing unit would not come on. Upon inspection I found that none of the equipment was actually running. Found the blower motor run capacitor swollen at the top which is a sign it has gone bad. Replaced the run capacitor for the PSC motor. The blower now come on at work but still no action from the condensing unit. Went out to inspect the condensing unit and found the contactor pulled in but no activity from the fan motor or compressor. The capacitor checked out OK for the condensing unit but found no power coming out of the contactor when there was line voltage coming in. That shows me that the contactor was no longer good And needed to be replaced. Replaced the contactor and he condenser came on with no issue. System is now operating with a 20° temperature differential and all components are working as they should.