Jaguar XJ Manual Heater/Air conditioning control 2022

A new version of the manual heater control has arrived. Based on the same circuit as previous boards, the new board has been reduced in size and now fits into an included case. Thanks to a fellow Jaguar enthusiast for taking the time to create this new version.
As before this board works with Series II and Series III Jaguar XJ6/12. It also works with any XJS that has the mechanical servo system.
It is "manual" in the sense that it will not attempt to keep the interior at a set temperature. As in the video, moving the Temp control will operate the servo manually. The servo will follow the Temp control knob from full hot to full cold or anywhere in between. For example, it you set the Temp to 75 you will have a mix of hot and cold with med fan speed. Setting it closer to 65 will move the mix more toward cooler temps and faster fan speeds. It is fully linear between 65 and 85 and the servo will move to change the temperature mix and fan speeds as you move the control.
Questions? [e-mail]