I would ask about around your local truck dealers as these will have people to deal with the night heaters in the trucks,
As per Franky. Also check out the boatyards as they will be able to recommend a service agent if they don't do it themselves.
Hi spruce, well you wouldn't believe this, i went to the local boat yard who usually sort these kind of boilers and he said, we used to service them, but not any more, and i asked him why, because they are good boilers and not much go wrong with them, but he said otherwise and he said they had lot of problem with them recently, he then recommend me some one in poole who specialise in webasto, which is quiet far from me, and when i phoned the other guy, he said the same
and now i am thinking if there is any serious problem with webasto servicing department.