On Mon, 09 Feb 2004 11:38:22 +0000, Andy Hall wrote:

On Mon, 09 Feb 2004 09:13:22 +0000, tarquinlinbin
wrote:

On Sun, 08 Feb 2004 11:55:00 +0000, "Ed Sirett"
wrote:

Big snip for brevity

From the sypmtoms described I'd say the gas valve is not even worth
thinking about changing the PCB just possibly, a service very much what's
needed.

There is only one PCB it does 'everything'.


[1] In fact there are significant numbers of Suprimas being installed in new
build. Probably because architects have not clocked the problems with them
and are still specifiying them.


It is strangle that the Potterton profile still suffers from exploding
boiler syndrome,just like its predecessor,the potterton netaheat.

I visited one only the other week which had exploded in the night.
There wasnt much left of it worth saving.

joe

What's the mechanism by which it does that?


There AFAIK only two way s a boiler can explode
1) A gas explosion.
2) A steam water exlosion in the heat exchanger.

The first might be caused by a leaky gas valve the second by a _totally_
blocked heat exchanger.
I can't see why these boilers should be more prone that other makes using
similar if not identical components.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at 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