Upon our arrival we 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 with electrical insecticide, installed new air filter then verified system safety and performance. Found everything to be operating within manufacture specifications at this time. Customer did mention that in the heat of the day the system does not want to keep up. With the unit performing very well I recommend having new insulation installed in the attic and considering having the windows upgraded to something more efficient.