Came out to call for a system not cooling properly. Customer stated that the system was running constantly but not blowing cool air. He thought that it may have something to do with the freon. I checked the system and found the capacitor bad. System calls for a 75/10 and what I had available was a 80/7.5 on my truck. I installed that for now to get customer cooling. Discussed repair and also about doing maintenance on the system. Customer signed up on the blue shield plan and also approved repair needed. Told customer I would come back to do the service and also bring the right size capacitor to install in the system.