cbtLR5

Hi! I've a Dicovery L462 with a Hydronic 2 d5s (diesel) OEM fitted. I would operate the heater for a whole night in case of in car sleeping in cold conditions. The problem with OEM fit is that the system will only operate 1 time per cycle of driving...in others words this cannot run a whole night. The another problem is that the internal front blower is power supplied and operated using PWM, so the pin for blower cannot be usefull alone. (for that problem I could read out the PWM frames to replicate them using a little PCB and a potentiometer to adjust the fan speed...) Currently IDK what is precisely exchanged on the LIN bus between the Heater and the HVAC module into the car. Thank you for any advises Eberspacher Hydronic 2 d5s 25 2556