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Mend Vaillant Heating Thermostat Combi

vailant combi boiler?

my combi boiler will produce hot water but will not heat the radiators. the boiler will kick in untill it gets to the temperature that the thermostat is set to and then cut out as it normally should. but still no heat in the radiators? is it a problem with the thermostat? any ideas?

coops
January 2010

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