Only system in the house, 3 years old. Temperature wasn’t keeping low yesterday. Inspected entire system. Compressor wasn’t fully engaged and humming. Dual capacitor was weak (reading 38 on a 40 microfarad). Replaced dual capacitor, but still compressor not engaged. Added a kick start capacitor, to help compressor to start. Compressor started and ran with normal amperage. Checked pressures, filter, drain line (clear). System is working properly, with the kick start capacitor only. When I removed start kick capacitor, compressor didn’t engaged. System is 3 years old only, and customer wanted me to re install the old capacitor. She will contact the company that installed for warranty purposes. System is too new for a compressor issue. Also, outside condenser is very dirty and in needed of a chemical wash. Sent estimate for this repair.