I've got a problem with the Baxi boiler in my home.
I've been unable to get to the bottom of the problem after
a run through the fault finding guide in the booklet and also done some
limited testing with a circuit tester to make sure that resistance etc
occurs in the places that it suggests it should.
This has brought me to a dead end and i'm quite happy to admit i'm getting
out of my depth.

So on to the point -

The boiler will start up as normal and run for around 5 minutes - the
radiators get nice a toasty, etc.
After 5 minutes the burner will cut out and the gas flow is cut off (a quick
observation of the gas meter numbers shows this to be the case).

Since the overheat light isn't coming on and all the radiators get nice and
warm that seems to rule the pump out.

After the cutout the fan keeps running and the electronic ignition keeps
trying to reignite the system (to no effect as gas isn't been supplied).
The system then fails to do anything else for the "run time" set on the
timer.
If i choose to turn the system off the "pilot light" stays lit (on as a low
flickering light) until the system is force reset / cools down.

At which point the whole sorry story starts again.

I'm reasonably new to the area i live in and i'm a little bit cautious of
getting a "man in" if i don't have at least a rough idea of what the problem
is likely to be...

I would have spoken to the original fitter but he/she didn't bother to fill
out the installation document (the same applies for everyone on my estate -
i asked).
I'd also like to ask them why the temperature sensor and overheat sensor are
conected to the pipework in the wrong order (but thats another story and
since it's worked reasonably well for a couple of years it doesn't seem to
be the likely culprit(?))

Has anyone seen anything (fault wise) similar to this with this type of
system before and if so could you point me in the right direction as to what
the likely cause of the problem is.

cheers,
-
Richard