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Q: heating and cooling on 2002 Ford Explorer

heat blows cold air and ac blows hot air. loud clicking noise
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There is a technical service bulletin that may be related, here is the number and a brief description of the symptom: TSB 01-12-06
Some vehicles equipped with the manual A/C system may exhibit a continuous clicking noise from the blend door actuator when the blower speed is set at the #2 position and the temperature control knob is set between the 12:00 and 2:00 position. This may be caused by separate power sources to the blower motor & blend door actuator
counteracting each other resulting in a clicking or fluttering noise.
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