We have had the above combi boiler working fine for the last 3 years;
however it now fails to deliver hot water or even 'come on' when the
hot water tap is turned on.

Could anyone please tell me what the likely problem is and also how to
find a good trustworthy plumber/engineer?

Many thanks.

On Sun, 12 Feb 2006 13:14:40 -0800, bedazzled wrote:


We have had the above combi boiler working fine for the last 3 years;
however it now fails to deliver hot water or even 'come on' when the
hot water tap is turned on.

Could anyone please tell me what the likely problem is and also how to
find a good trustworthy plumber/engineer?

Many thanks.

If it fails to 'come on' for HW then the problem must lie with whatever
means is used to detect HW flow. I assume that water is coming out of the
taps at a normal rate.

I don't have a manual for one of these so I can't help further. You may
have a manual and it may say how the boiler detects HW flow.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

Many thanks. I have now found out that it is a defective diaphram
which under water pressure pushes out a pin to operate a switch which
then fires up the water.

Thanks for your post!

On Tue, 14 Feb 2006 08:03:13 -0800, bedazzled wrote:

Many thanks. I have now found out that it is a defective diaphram
which under water pressure pushes out a pin to operate a switch which
then fires up the water.

That's pretty much the most common arrangement.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

replying to bedazzled, Micky blue wrote:
Hi
Most likely the larger rubber membrane in the diverter valve block.
There will be a hole in it. So no pressure build up to drive the pin out to
the micro Switch

--
for full context, visit https://www.homeownershub.com/uk-diy...er-329510-.htm