what would make my ac comm. click back @ 4th when comm. is engaed ?

Asked by Sep 07, 2013 at 05:30 PM about the 2000 Chevrolet C/K 3500 Crew Cab LB RWD

Question type: Maintenance & Repair

shattered plastic wheel in 2 hrs. used 2 diff. belts , same results.

1 Answer

105,495

If I read this correctly, your A/C compressor is cycling rapidly, and it has caused 2 idlers to shatter. Might be dealing with more than just one problem here, A/C cycling is usually caused by low refrigerant pressure, have the system checked. Pulley shattering may have been caused by the belt tensioner bouncing caused by a weak tensioner spring, there is a special tool for measuring belt tension on serpentine belts, if you don't have the tool, they can check it while you are having the A/C checked.

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