Performed biannual maintenance check on HVAC system. Inspected AC unit, which had frozen due to dirty filter; confirmed system is now operational but reading slightly low refrigerant levels. Conducted furnace maintenance including gas pressure verification, flame sensor cleaning, and filter inspection. Noted air exchanger filter requires replacement and customer was instructed on proper replacement procedure. Identified potential need for refrigerant recharge next season and documented intermittent fan motor operation that previously required manual starting.
