Combi Boiler problem

9 Aug 2005
Reaction score
United Kingdom
I have an Icon 23t combi boiler situated in my upstairs bathroom.
All has been fine with it until recently. Now, if I turn on the hot tap in the bathroom the boiler fires and the water gets hot as it should. If I turn on any of the downstairs taps or the try to use the downstairs shower, the boile doesn't fire at all. CH works fine.
Any ideas? :confused:
Sponsored Links
Sounds like a diaphragm problem. Does the hot tap that works give a stronger flow than those that don't? If diaphragm is developing a split, it will only work when flow rate high (until it stops working altogether).
the diaphgram in the water section has developed a split not allowing the push rod to make its connection
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local