I have a Landis and Gyr electronic timer (seems fine) attached to a boiler which provides hot water via a hot water tank.
You can have the hot water turned on by itself, or have hot water and Central heating together.
Today putting the Hot water on (by itself) the radiators have all become hot (and the central heating system is off) the thermostat is turned down but this has not helped.
Any suggestions?

Rob, October 2007

Paul thanks 4 the reply, the three way valve was sticking, I have manually moved it and it seems fine now.
Thanks
Rob

Rob, October 2007

Check your wiring, to be sure it's wired right. You might have a short.

Paul, October 2007

could it be my three way valve?

rob, October 2007