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Mend Vaillant GB 221 H Home Heating Systems

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Mend Vaillant GB 221 H Boiler Heating

Vaillant Gb 221 H Stays on?

After hot water use the boiler sometimes continues making a noise (the "working" noise) and the main flame will then come on and off intermittently even though the hot water tap is closed.

allan crossley
July 2009
VaillantVaillant GB 221 HHeating, Home Heating SystemsBoiler Heating Vaillant
Not very sure on this boiler unless you have preheat hotwater knob on the panel which will keep hotwater in the boiler hot all the time and that will keep boiler on and off by its self all the time

Mr K
July 2009

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Find out how to mend Vaillant GB 221 H home heating systems