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Sabre 29 water pressure drop?

sabre 29 water pressure dropped, how to increase the pressure
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Mend Vaillant 2421e Boiler Heating Repair

how can i fix my vaillant 2421e boiler?

boiler ignistion sparks but pilot will not light could this be a faulty gas valve

gus
November 2010
VaillantVaillant 2421eHeating, Home Heating SystemsBoiler Heating Repair

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