Posted 3rd September, 2024 at 16:25 by Michael Burgess
Hello Tormod. This switch is not to be connected to your Eberspacher D8LC heater. It connects into the heater blower box to control the fan speed. It is simple to wire into the heater blower matrices and no wiring diagram should be required. We can help you with this if required. This rotary fan speed controller can be used on any heater matrix that is capable of up to 3 fan speeds as seen on this page: https://www.butlertechnik.com/eberspacher-webasto-installation-accessories/water-heater-matrices.