Came out to call. Customer said ac wasn’t working. He already changed the capacitor and washed the unit and it still wasn’t working. System is an 8 year old Lennox unit. It has a high pressure switch reset. I reset the switch and the system came on, but the compressor wasn’t kicking in. I recommended a hard start kit and washing the condenser. Customer had me install hard start kit. Compressor kicked on. I checked amps temperatures and pressures. System is cooling properly.