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Hot water but no central heating?

Topped up water, checked thermostat, electric trip switch checked. Pilot light on, can get hot water but radiators are cold and house is freezing. Got a Vaillant, must be about 20 yrs old now.

help!

Liesel
February 2010
VaillantHeating, Home Heating SystemsHot Water Central Heating
sounds like a diverter valve but as henry says what model, not many willing or able to work on a 20 yr old boiler if it is a combi

john
February 2010
what model?

henry
February 2010

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