On Sun, 25 Sep 2005 12:50:01 -0700, koolio wrote:

Hi Geoff/Ed

Thanks for the replies.

Geoff - No clicking , Pilot is on, pump and valve work fine. Just
pumping cold water around.

Ed - Don't know about the heating of the phial, but the boiler does
fire up initially but dies again after a few minutes.

Thing is it was working fine all week. I bled the radiators this
morning, there was a little bit of air in one, about 5 seconds worth,
but nothing major. One thing I noticed is that it does get awfully hot
to the touch. I know that it would get a little hot, but not sure how
hot they are meant to get. I cannot touch it sometimes. The fan works
fine.

This seems more like there is no circulation. Perhaps the pump is driven
by the boiler? It may be that the pump over run stat is not changing over
as it warms up. Initially the stat will send the pump the boiler demand
signal when the boilers get above a certain temp it will flick over to
connecting the unswitched supply live to the pump.



The other thing I notoiced today is that if I drop the PCB mouting
plate from the front and let air flow freely through it worked fine for
a few hours. Have put it back on timer and left it open tonite to see
if it works OK in the morning. Could this be a dry joint or a problem
with the trip switch?

Might just have kept things cool enough to work?

--
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