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the radiators are hot, but the heating is off??

My Heatslave 20/25 is showing that its heating the hot water but the central heating is switched off. However for some strange reason the radiators are now heating up!?
james Lowe, August 2009
It's your Diverter Valve, Worcester use Two types, both made by Honeywell, On has a grey Plastic Actuator, and is a Linear Valve, the other has a silver metal actuator, and is the more traditional Ball& Lever type, Both can Stick, But equally both can suffer from worn seatings meaning repalcement.

Best to get An OFTEC registered Engineer to take a look

www.elanar.co.uk, August 2009