inside your hot water tank you have an immersion heater which works off electric and is totaly seperate from the boiler. Switch it off next to the tank or pull the fuse at the circuit board
paul ashbridge
February 2008
Do you have an immersion heater in your copper tank thats switched on? Presumably your boiler isn't a combi.
John
February 2008
I can answer this question...
i have constant hot water but the nothing is switch on ?