Q: Annoying noise when I set the AC

asked by on October 29, 2015

I own a 2011 Ford F-150 3.2L V6, automatic transmission, with 58k miles. Earlier this week while I was driving on the highway, I attempted to turn the A/C to its coolest setting by turning the knob all the way to the end of the blue (cool) side. A clicking noise came on and wouldn't stop until I rotated the knob back into the red (warm) range of the control. The noise doesn't occur unless the knob is rotated completely to the cold side. This is annoying and embarrassing with other people in the car since sometimes I want to run the A/C on its coolest setting and its uncomfortable otherwise. Help, please.

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