Performed cooling tune ups on all 3 systems checking all electrical components, refrigerant balance, unit start up, operation, shutdown, cleaning of indoor and outdoor units and treatment of drains. Customer complaint of high power bills in winter. Checked systems in both heating and cooling and found system draws about 30-40% more power in the heating mode. 2006 r-22 downstairs unit is doing the most of the electrical draw in heating mode at 8.8 amps @ 70° outdoor temperature. Replacement of downstairs system could see a reduction in power consumption.