We’re arrival the AC NOT running at all . start diagnostic the air handle was running. The building was very high. We need a ladder.I went top of the roof start diagnosing the unit. The compressor was not running. I checked the capacitor. Capacitor was reading one. Replace capacitor 40–5 compressor start running .check the pressure. was good went downstairs the air coming cold from the vent. customer want price for maintenance plan.