Heating maintenance. Cleaned and serviced furnace under annual VIP service plan. Tested inducer motor, pressure switches, ignition, gas valve voltage and pressures, flame sensor, blower motor amperage. Checked heat exchanger and thermostat. Cleaned drain trap, all hoses and line. Replaced furnace filter that customer provided. I did replace the humidifier pad using a #35. Everything is in accurate working condition and is heating as it should at this time.