Question about 2000 Ford F250 Super Duty Crew Cabs

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Automatic temperature control system

2006 ford f250 climate control system when off stays in the defros mode when on the fan is full blast, any advice?

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  • Anonymous Mar 15, 2009

    Same problem, same truck. Turn off the climate control system and the Fan moves to Defrost max speed.

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I am not sure I understand your question. When the control head is turned off, the system goes to defrost mode (failsafe by design) and the blower should be off. If the blower is at high speed when the control is in off, you have a faulty blower speed control module (power mosfet is probably shorted).

Posted on Dec 31, 2008

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