Performed Ac maintenance on 9 year old Lennox system. Cycled system for cooling. Checked indoor unit electrical and system components. Temperature split is within range and system is producing proper temperature. Replaced 1 inch filter. This is a single stage unit with 2 zones, which is not ideal. Checked outdoor unit electrical and system components. Amp draws for compressor and condenser fan motor are within range. Primary motor control is in good condition. Secondary motor control is within range. Cycled system, system is operational upon departure.