Demand call for package unit from 2015 not cooling properly. Upon arrival the maintenance worker showed me around and mentioned that they’ve had a contactor outside replaced, he changed the thermostat himself because it just kept on turning on and off every time it called for ac, and changed the air filters. During my inspection the fans outside and inside were running but the compressors weren’t. I inspected the thermostat wiring and found the thermostat to not be wired correctly or programmed correctly. I fixed that and continued to inspect the system, I later found the contactor that had been replaced had been wired incorrectly and was actually bad again. I informed the customer and he agreed to have me fix the contactor and properly wire the system. After the repairs the system started up and starting cooling properly. Temperature inside went from 76 to 70, I also did a quick rinse on the outside coil to help the efficiency increase a little bit. System is running upon departur