Arrived to do a dual performance maintenance. Inspected the systems air filter and found dirty. Advised homeowner about the importance of maintaining a clean filter in the system. Inspected the condensation drain line for flow. Measured amp draw for indoor fan motor. Checked blower for cleanliness and to see if there is any play in the bearings. Verified operation of all mechanical and electronic components. Inspected the system heat e strips ensure they are all working. Verified temperature split for both emergency heat and normal heating modes. Verified operation of the humidifier. Found that the humidifier panel is coated in calcium buildup and the fan motor is making noise upon start up. Cleaned air handler and water heater. Switched system to cooling and measured a temperature split. Moved inspection outside. Inspected the coil for cleanliness and excessive vibration. Verified operation of all electronic components of the condenser. Verified system refrigerant charge. Rinsed coil