Refresh your vehicle AC system with Infiniti, Volkswagen, and Nissan AC parts, including HVAC circuit board and HVAC control. Automotive HVAC controls allow car driver and passenger to control the cabin climate for comfortable driving year round. The HVAC control board controls the blowers, diagnostics, and all working parts of the car's heating and cooling system. If your car's HVAC begins to fail, your air conditioner, defroster, and heater will not work properly, which poses a safety hazard. Get the parts you need with our VIN-based fit guarantee and a warranty from the manufacturer when you shop now.