2004 eberspacher d4s heater

[1990zr1]

Hi.
Does anyone know how to unlock code f15. Ecu looked.
My eberspacher shop can not manage. Will it help to go to mb workshop?

[HerrmannOnTour]

You can have a look here. Same issue some time ago. The D3LP has a special sensor (kind of melting fuse) on the outside of the burning chamber which gets damaged when overheating. Maybe it’s the same with the D4S. So first of all you should check whether there is such kind of fuse, measure the resistance and replace it if necessary.


BR,
Matthias