On Tue, 11 May 2004 17:34:57 +0000, ski wrote:

Air pressure switch ?


"Graeme Proctor" wrote in message
m...
My Potterton Profile 80 Boiler, will not start, the system is live,
the fan Kicks in and out, along burst at first, then a 5 second gap
follwed a a 2 second burst on the fan. But throughout it simply wont
fire up. I have tried using the reset button on the bottom og the
boiler but still nothing.

Does anybody have any ideas??

Is this a repeating cycle? If so its the control box.

I'm not totally sure but I think the underlying cause is that the relay is
stuck. Mechanical encouragement may unstick for a while.
The problem is that the fan start the APS responds but the relay does not
switch over to keep the fan running so the APS fails after a second or
two. Then the fan is powered again and so on....

Replacements are readily avilable from cetltd.com .

--
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