We started off changing the filter 20x25x1. Upon inspection of the unit we found wire to be cut/chewed in half by some kind of rodent. Repaired wire and restored power to the unit. We also checked and tested electrical components. Everything tested within manufacture specifications today. As a courtesy we placed foil tape to help denture rodents from entering outdoor unit. We did briefly discuss routine maintenance and sent an estimate for membership agreement. Unit is cooling on departure.