Upon my arrival in Muldoon I did Air Service. I performed a 6 month checkup on 1 heat pump system. Flushed and treated the water removal system, washed the condenser coil using water, cleaned and treated the electrical cabinet then verified the systems safety and performance. I found everything to be operating within manufacture specifications at this time. Made slight adjustments to both comfort controls. With the condensation on the vent hood the lead technician will be sending quotes over for installing a back flow damper on the vent pipe to prevent outside air from coming into the home when the AC is in operation. If customer goes with the quote we will need to come out with the USD card to update the older infinity wall control when the repair is performed on the vent hood.