I have a Dimplex XT18. The heater input is usually set on 4 but most nights the thermal cutout switches off the heater after being on for a few hours. There is a wire that connects the thermal cut out to the charge controller and the sheathing on this wire has corroded away (due to heat). The thermal cut out is triggered by this bare wire arcing across to the storage heater casing. What spare part do you think I need? I was thinking of just replacing the wire/sheathing, but why would it get so hot in the first place?

Geoff Cripps, January 2008

I just moved into a new house which has the same heaters, and two of them dont work at all. When i opened it up I had the same problem as you, the wires have melted/coroded away. I think i'll just phone S&S Energy to get them to send someone out to fix it. Aparently its because someone at some point would have had the heater on max boost and max temp or maybe covered it up at some point, at least thats what I can see from doing a web search on the problems.

Gary McRae, February 2008