I went through the same bs with the dealer when I first bought my car. The ic pump not working only turns off the super charger when the car is hot from driving perhaps 5 miles or more. The dealer would never drive it enough to have the symptom appear. I finally took multiple postings from this site to the dealer ,and the new ic pump fixed it. This was done under the extended warranty $150 deductible. I am betting the pump is your issue since its so common.