Arrived at customers for system tuneup. On arrival customer show me to air handler unit. Opened air handler unit and saw bio growth. Pointed out to customer and suggested she get a UV light. Customer agreed. Customer also had a $200 off coupon. Cleaned the entire inside of cabinet and Installed the UV light and turned on. UV light is working fine. Fan is clean. Evaporator coil is clean. No water was seen in overflow reservoir. Float switch currently working. Unit is producing proper delta. T. Next went to condenser unit. Condenser is not currently equipped with a surge protector. Pointed out to customer. Opened electric cabinet and tested all components. Contactor sending proper voltage. Capacitor within acceptable range. Unit is starting up fine. Drain line. Goes to community drain. Unit checks out Gave report to customer and customer is happy with work performed. Collected payment and signature and left. Thank you for choosing total air UV Light