A HVAC Control Module can stop working for several reasons. Sometimes the AC Climate Control hook that is connected to the knob falls off. Sometimes the ac/heater climate control switch circuits malfunction, sometimes the ac heater climate control unit works but the cooling stopped working.
If replacing the ac/heater climate control head/module does not fix your HVAC Control System, then the issue could be with the hoses. For example, a hose leak could cause cooling to feel lukewarm. I hope this video helps with removing and replacing the ac heater climate control unit.
If you feel confident in your car repair skills then add this to your DIY projects. In this video we cover the steps on how to remove clips, bolts, covers, panels, and parts for the removal of the climate control cluster aka AC Unit Assembly.
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