I completed a two system heating maintenance. I replaced 1-18x18x1 ,1-14x14x1 and 1- 20x25x5 media filter. I checked the amp draw on the blower motor and heat strips for upstairs unit. I cleaned the flame sensor and igniter on the main floor system. I checked the amp draw on the blower motor for main floor. I checked the refrigerant charge, these defrost cycle and checked all electrical components on upstairs heat pump. I checked all safeties and confirmed proper sequence of operation. Both systems are currently heating at manufacturers specifications.