My dash fan control was exhibiting weird behavior. The fan only working on some positions and not others is usually the blower resistor pack, but in my case the air-con was only working in inverse with the fan. What gives?

Links for resistor packs:
Amazon US: https://amzn.to/3FnT6i6
Amazon UK: https://amzn.to/3M5Mysu

The car is a Ford Mondeo Mk3 (2002), but this video will be applicable to many other vehicles.

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