MAINTENANCE CHECK-UP FOR 2 UNIT, AND HEAT. CLEAN AND CHECK CONDENSER COIL. CHECK VOLTAGE AND AMPERAGE ON MOTORS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. LUBRICATE ALL NECESSARY MOVING PARTS, ADJUST BLOWER COMPONENTS. CHECK HUMIDIFIER, THERMOSTAT, AIR FILTER, AIRFLOW, FREON LEVELS, DRAINAGE, ENERGY CONSUMPTION, COMPRESSOR DELAY SAFETY CONTROLS, AND ALL ELECTRICAL CONNECTIONS.