Arrived to furnace maintenance. I began my maintenance at the main floor furnace. Here I repaired the return duct that had been stepped through. Next I attempted to wire in the existing air cleaner with it no longer being operational. We will return to replace this with a new Pure Air air purification system. Combustion analysis, inducer motor, igniter, flame sensor, and blower all performed within spec. Next I made my way to the upstairs air handler where I replaced the air filter and checked for proper heat and blower operation. I cleaned all air filters on the two mini split systems, ensured proper temp split, and reversing valve operation. HVAC running upon departure.