On Sun, 08 Jan 2006 14:58:38 +0000, Andy Hall wrote:

On Sat, 07 Jan 2006 23:23:42 GMT, raden wrote:

In message , Andy Hall
writes
On Sat, 07 Jan 2006 20:44:48 GMT, raden wrote:

In message , Andy Hall
writes
On 6 Jan 2006 05:30:07 -0800, "Bal" wrote:

The boiler pilot light goes does not stay on, once the pilot light is
started and I turn the thermostat is turned up the boiler starts up and
stays on for around 30 to 60 seconds then goes out completely.

Has anyone got any ideas on what I can check or needs replacing before
going mad and changing all sorts of parts ?

Do you mean that the pilot light will stay lit if the boiler isn't
firing but goes out (and the burners too) after the burner fires?


If so, it could be that the flame failure thermocouple (

Electronic ignition and flame sensing (PCB 202006 or 202052)

I still reckon that on a fuelsaver, the first port of call is the fan if
it's cutting out


Are you sure, Geoff?

I used to have one of those (pretty sure it was the Mk II) and it was
pilot ignition and simple minded controls....... no fan or pcb.

Well, I could be wrong because I've never come across it, but the
fuelsaver I know isn't a "fuelsaver E" or any other designation. There
is the Fuelsaver "F" but both versions I know have a fan and a sequence
board in them

Yes, I think it's that.

The one I had was installed in 1985.

I looked on the SEDBUK database, and the original MkIIs show no fan
and efficiency of 65% - same as I remember it. Then there is an 'F'
model (fan I suppose) which has 68% and was manufactured up until 1991
(seems hardly worth the fan and PCB for 3% improvement). Finally
there are some others going up to 79%. Presumably they must have
changed the heat exchanger as well at that point.

The 3% does sound rather too little improvement for adding a fan.
The lack of permanent pilot is reckoned as +4% alone.
The fan makes a huge contribution to the part-load efficiency.


--
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