Can anyone out there help. My 86 Hunter has Webasto hydronic heat but needs a new control unit. I'm told these are available ex Germany (the unit is now 25 years old) but BIG bucks. I'm hoping to find a used one somewhere. The unit is SG 1560/12V 105.499. The last 6 digits are important as the logic in the controller differs from most other models in that it required glow plug sampling to progress.
