Recently a plumber changed our immersion heater and after being called
> back twice to rectify afailed thermostat he embarked on other work
> nearer home and I ended up changing the thermostat myself.I have now
> changed it three times and each time the same problem arose.even though
> the thermostat is set to a low temperature the water overheats and the
> power wire to the thermostat melts and eventually disconnects.I have
> tried a heat resisting wire but this burns too as do the plastic top of
> the thermostats.The fuse is 15amp and has not blown atall during these
> traumas.The cylinder when connected gets very hot at the top and is
> often quite cold below.I wonder if anyone can suggest something before
> I purchase another thermostat .Thanking you ...Skilso
Thankyou to all contributors and I regret I was unable to read them and respond until now .....during this time a different type of thermostat has been fitted and appears to have solved the problem,it seems that the range of new thermostats which I used must have been inferior,So Whilst thanking the other contributors it looks as if John hit the jackpot. Many thanks to you all...... SKILSO