Furnace tune-up and safety inspection. Cleaned and serviced furnace. Tested all mechanical components. Cleaned all sensors. Cleaned condensation trap. Cleaned all pressure switch hoses and inlets. Tested gas valve voltage and inlet/outlet pressures in both 1st stage and the 2nd stage heating. The system is clean, heating, and operating properly at this time. Performed free plumbing inspections. Customer renewed VIP Maintenance plan.