Re: Tricity Sovereign 4638
hi kwikfire
this apppliance has a safety cut out to prevent overheating, the first thing to check is on the right hand side of the oven side panel near the front, there might be a filter there that may have become obstucted with fluff, as this is the point of entry for the air intake for the internal cooling fan, other than that its time for an engineer, check out the repair toolbox on the left of the site for an engineer close to you.
Bob.