The number is SGS43T72GB/06
Yes, the pump is running all the time and it does run with the door open.
Sorry for the delay in my reply but I have only just found your response.
Await your reply,
I followed your suggestions and after turning the machine over to check for screws to remove side panels, some water came out. When I righted the machine and tried it's operation, it worked normally/correctly. I suspect that getting the water out may have been the answer, as you suggested. Anyway, what ever it was your advice led to the correction of the problem, so I'm satisfied with your help,