On Sat, 24 Apr 2004 11:27:55 +0100, Jerry. wrote:


"geoff" wrote in message
...
In message , Jerry.
writes
snip
On restoring the power supply one of two things happen, either the green
LED
will flash at about 10Hz three times and thus we are back to isolating
the
electrical supply again or the boiler will behave normally until the next
time this fault happens.


Sorry, I don't know offhand, it's definitely not a common fault. Is it
sparking when the green LED flashes at 10 Hz?

No, the boiler is dead apart from the flashing green LED.

This fault could not be due to a faulty gas valve thermo coupler, as was
mentioned to me by the people that fitted a new PCB to the boiler about two
months ago ?

The boiler is electronic ignition!
What does the manual say....
If you have not got one Potterton will send you one.
If you want to you can download it from Potterton.

Unfortunately flashing at 16Hz is listed but as meaning 'ignition in
progress'. Three flashes on their own is not listed.

It is possible that the flashing lights have a specific meaning eg. APS
circuit closed (but ought to be open).

My guess is it's the PCB.

--
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