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Losing water Worcester Bosh combi boiler?

Hi
I have an oldish combi boiler and I am having to top up the water daily. I have hunted the house for leaks - checked all radiators. I have the boiler serviced every year but my plumber is shaking his head and cannot resolve it for me. He is very reluctant to put a leak sealer in my system. Has anybody any ideas.

Annie
November 2009

Worcester Bosch Worcester Bosch combi boiler Heating, Home Heating Systems Boiler Heating Plumber

Two things...check the overflow isn't leaking outside.
Then, check the automatic air vent (AAV) on the top of the boiler as these always seem to dribble when they get on a bit. A bit like me really!

John
November 2009

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Worcester Bosch Boiler Losing Water - Help!