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As a car owner, you're likely no stranger to the frustration and discomfort of a malfunctioning heating and air conditioning (HVAC) system. But did you know that the root cause of many HVAC issues lies with the heater-AC control module? In this post, we'll delve into the world of heater-AC control modules, exploring what they do, how they fail, and most importantly, how you can extend their lifespan to keep your car's HVAC system running smoothly. What is a Heater-AC Control Module? A heate …