On Sun, 25 Sep 2005 00:29:40 -0700, koolio wrote:

Hi Folks,

The boiler pilot lights but the boiler fails to go all guns blazing. I
replaced the 3 Port motorised valve and pump a couple of weekends ago.
Filled up and everything was working fine.

Now the boiler just seems to cut out. Pilot stays on though. If I turn
everything off and restart, it'll fire up for about 5 minutes and then
die on me again.

Any ideas. Cannot find any manuals on potterton site so don't know
where to start. Any help would be greatly appreciated

IIRC these boilers are overgrown "neataheats".
The pilot flame works on a phial+capilliary tube which moves the gas valve
to the full rate. Very like many ovens work.

These symptoms probably don't indicate a bad gas valve (although that
could be a cause), it's possible that when the boiler warms up the pilot
does not heat the phial enough?

--
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