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Mend Worcester 35cdi Home Heating Systems

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Knocking noise on boiler?

I have a worcester 35cdi combi boiler which has developed a knocking noise, possibly due to air lock. How can I clear it?

R. Wilkinson
March 2010
Worcester 35cdiHeating, Home Heating SystemsBoiler Combi Air
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Find out how to mend Worcester 35cdi home heating systems