Arrived at customers house for system inspection. On arrival customer showed me to air handler system. Open air handler system and saw unit was equipped with a UV light. Light was past suggested change date. Pointed out to customer and suggested we change. Customer agreed. Under evaporator coil was dirty. Fan was dirty. Suggesting an electronic air cleaning filter at air handler filter box. Filter box is 21 x 20 filter. Unit is producing proper delta T. no water is seen in overflow reservoir. Float switch currently working. Next went outside to condenser. Noticed condenser was not equipped with a surge protector. Opened electric cabinet and noticed components had been changed in the past. Pointed this out to customer and suggested a surge protector be installed. Customer agreed. Installed surge protector. Tested electric components inside condenser. Contactor sending proper voltage. Capacitor within acceptable range. Unit is starting up fine. Unit is equipped. With a hard start kit.