immersion heater. ?

You've adjusted the thermostat? Did you fit an immersion heater of the same length? I believe you can get short ones which won't provide much!

Colin
January 2010

don't mean to sound daft, but did you fit a long enough element. i've seen in the past people will fit a 11" element in a large tank when really it should be a 18" or 27"

Ian
January 2010

Does it have an adjustable thermostat? (The live feed wire connects to it)
First make sure you haven't got a short thermostat probe in an upright cylinder. Short probes are mainly for side fitting heaters, long ones are for top fitting heaters. If you have the right one-turn the adjustable rheostat (clockwise) up to 160F, but don't forget to turn the immersion switch off first. If that doesn't work get yourself a new thermostat probe.

Geoff down in Wales
January 2010