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Mend Vaillant Dial Heating Side

Dial on red?

My vaillant boiler dial is in the red on the heating side

Al
November 2009
VaillantHeating, Home Heating SystemsDial Heating Side
you have got to much pressure in the system, release some excess water out through a radiator air bleed valve till the system pressure drops back down to around 1 to 1.5 bars working pressure.
if after doing this it climbs up to the red again further investigation of the system will be needed.

wirecutterman
November 2009

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