Wednesday 31 December 2014 12.22am
Hi RMiranda, there are two immersions on the tank - one which runs off overnight economy 7 and the other on the peak day rate which the boost switch controls. The economy 7 immersion is designed to use the cheaper rate electric at night to heat the whole tank - follow the cables to the wall switch and leave this one on full time, you should only need to use the boost then to top up if you need to. If you've done that and still have no hot water in the morning then either the immersion or the thermostat have failed so you'll need someone to look at that. There used to be a good handyman at the Circle called Sean who might be able to help or ask the porters. If they can't help PM me and I'll send you some contractor numbers, Hope this helps.
Happy New Year : )