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Mend Combi Boiler Hot Water Fluctuating

my shower runs hot then cold ect.its run from a combi boiler?

hot cold,hot clod even when theres no other tap or toilet being used in the house

t sellars
March 2008
I have the same problemn. Hope somebody posts a fix. I reckon it is something to do with air in the system reducing pressure at the boiler but I may be wrong there.

Roddy
September 2008
got the same problem with my Vaillant boiler, could anybody help?

Kevin
May 2008

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