The fan speed is changed by the wiring. The furnace fan in ac is changed by the green wire to high speed as per your attachment on the printed circuit board. the black wire from the motor is high speed and the red is low speed.
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The fan speed is changed by the wiring. The furnace fan in ac is changed by the green wire to high speed as per your attachment on the printed circuit board. the black wire from the motor is high speed and the red is low speed.