Furnace clean and check. Cleaned the flame sensor and burners. Checked the draft inducer motor, 4" flue pipe, pressure switches, ignitor, gas valve, circuit board, limit switches, blower motor and wheel. Installed a new Aprilaire #700 power humidifier with a new automatic humidifier control #60. Wired the outdoor sensor, humidifier, and furnace to the control. Cycled the furnace and humidifier with normal operation. Everything is working at this time.