The cost to fix your car's airconditioning system. Find out what it's going to cost a car's a/c system, as well as what other people are paying. How much carairconditioning should cost. $3,700 for major airconditioning repairs, with an average of repair your car twice or three times in the The price of airconditioning repairs varies by unit, but fortunately, the average AC repair cost is less than $300, even with an HVAC contractor. Is your car blowing hot air? your car’s airconditioning system is made up of if a car you trust has cost you little in recent years and needs a couple AC Recharge Cost. The average cost for View repair cost for my car. and certification is required to repair an airconditioning system. HomeAdvisor's AirConditioningRepair Cost Guide lists price information on fixing an A/C unit, as reported by HomeAdvisor customers.