No answer I'm afraid but this happened to us about 4 months ago. We called out an independent repairer who took off the back panel, could find no fault, was a good guy so wasn't going to charge us anything. He suggested that we needed to call out a Creda engineer because it was the programmer? possibly but then as he put it together it started heating again. He was baffled. It has just gone again this morning hence me looking at this site for an answer. Perhaps they just need a rest now and again. If it hasn't righted itself in 24 hours we'll call him out again and I'll feedback.
Gavin
August 2004