HVAC - Heating, Ventilation, Air Conditioning.

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A/C Issues with a Mechanical Temp. Control

First Start of my A/C is good but when my evaporator is cold, my A/C Goes On and Off Rapidly. On for a second then Off for a Second. Does it have to be the Mechanical Temperature causes the problem? ...
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2008 Chevrolet Impala. Clicking noise behind the glove box - I believe it has something to do with a diverter valve in heating and cooling system?

There is a clicking noise behind the glove box. I believe there should be a sensor or something to stop the motor for the divertor valve. It trys to keep shifting the valve and it clicks when it ...