I have a 4kW immersion heater in a thermalstore - very recently replaced by a plumber as the previous one was leaking. Supplied with a cotherm thermostat and a second pocket for a safety cutout into which the safety cutout from the previous immersion was fitted and seems to be working fine.
I smelled burning and removed the cover to find that the insulation on the wire between the cutout and the stat was melting. The end closest to the stat was clearly more affected. The stat has deformed around the point the wire connects to it and the stat has ceased to work.
The wire between the safety and the stat is exactly the same as the wire from the spur to the immersion which has been in place since I can remember. The connection seemed sound but hard to tell now.
One thing I had noticed after it was installed is that it was cycling on and off quite rapidly.
Just a faulty stat?
I smelled burning and removed the cover to find that the insulation on the wire between the cutout and the stat was melting. The end closest to the stat was clearly more affected. The stat has deformed around the point the wire connects to it and the stat has ceased to work.
The wire between the safety and the stat is exactly the same as the wire from the spur to the immersion which has been in place since I can remember. The connection seemed sound but hard to tell now.
One thing I had noticed after it was installed is that it was cycling on and off quite rapidly.
Just a faulty stat?