Cleaned and serviced furnace. Tested all mechanical components. Cleaned all sensors. Cleaned condensation trap and all hoses. Tested gas valve voltage and inlet/outlet pressures. Tested 2nd stage heating. Replaced furnace filter that customer provided. Performed heat rise test. System is clean, heating, and operating properly at this time. Customer renewed maintenance plan. One visit is being used today and they will have spring/ac visit of 2026 prepaid remaining. Performed free inspections.