Performed a complete heating system maintenance and inspection. Inspected and tested all electrical components and safety controls on the indoor unit; all components tested within manufacturer specifications. Verified system temperatures: return air temperature measured at 73°F; supply air temperature measured at 113°F and rising. Changed filter for client. Filter size is 20x36x1. Inspected and tested all electrical components on the outdoor unit; all components tested within manufacturer specifications. Except for the compressor start up amps. They were starting high at over 100 amps. Provided estimate for hard start kit to bring down those high start amps. Confirmed system was operating properly and heating upon departure. System Status: Operating normally at time of service.