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ALPHA CB 24X COMBI?

Now the heating is swithced off & the setting is for hot water only , the boiler started to turn the heating on by its self & radiators getting red hot , the radiator thermostat switch is switched to zero to only way i can switch it off is the main power switch to the boiler !
Nick Hibberts, July 2008
its not the diverter valve its the hot water heat exchanger

bev, February 2009
YOUR DIVERTER VALVE OR SWITCH IS KNACKERED

MACHINE, September 2008
what do u live

tricky, July 2008