A/C turning on when dash control knob is turned to upper/lower vent setting

mkepler954mkepler954 Member Posts: 1
edited December 2017 in Ford
When I switch the air flow selection knob to the Instrument Panel Vent/Floor Vent, the A/C compressor engages and then disengages about every 15 seconds and continues to recycle until I turn it off. This setting should be for heat only, not A/C. Help!!!
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