Heating in an electric car conversion: Modifying BMW Z3 heater controls

In this benchtop video I go through the full design and build process (including lots of screw-ups) to modify the heater controls from my BMW Z3 as part of its electric car conversion. I replace the mechanical controls for the old heater valve with a potentiometer using CAD and 3D printed parts. In a future video, the potentiometer will be connected to an Arduino that will in turn control a Mitsubishi Outlander electric water heater.