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pressure builds up too high ?

Glowworm Swiftflow75
Hi my problem is
When boiler is switched on pressure builds up too high
over 3 bars and blows out water at the back of boiler need help please.

Phil Thorpe
June 2012
Heating, Home Heating SystemsUp Too High
make sure filling loop valves closed
if boiler overpressurizes on heating could be faulty expansion vessel

AWOL
June 2012

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