A/C Switch Assembly

[RJH]

I have a 79 300D with a York air compressor. My problems: 1. When the car idles the belt slips over the clutch that stops momentarily - was told the bearings maybe bad in the clutch and need to replace? 2. Air compressor works and blows cold air - problem - need to engage through defrost, then switch to bi-level to maintain cold air flow - if I switch to High or Low - blows for about 60 sec then shuts off? 3. A/C switch has been newly replaced - problem - There is no power to A/C switch in either the on or off position - but compressor engages through defrost and stays engaged in Bi-Level? Was told may need A/C Switch assembly? 4. Was told Servo is working okay.

If I could get some help with these questions would be greatly appreciative and would like a reference of someone who maybe able to work on these problems in the Fayetteville, GA area or reasonably close by. Please email me @ rjhuddleston@hotmail.com
Thanks
Ron