For the second time our Zanussi washer dryer is unusable becuase the door is stuck. There isn\\\'t anything inthe machine (neither water nor clothes), but there is a light on the front and the door refuses to yield. Last time we had an engineer out who seemed to press a sequence of buttons and then leave (after charging £50 of course) I think the error code that\\\'s coming up is E50 (this is coming from not having seen the machine and hearing the problem over the phone). THanks in advance