In message , David Hemmings
writes
Well the damn boiler has locked out yet again, before i call out an
engineer again, i had a good poke around insdie the boiler (have
previoously opened up to thoroughly clean inside).

Well i noticed one thing, the water pipe at the left hand side at the
front has two sets of wires going to small cylndrical sections
attached to the water pipe. the bottom set has the wires affixed into
blocks that push onto tabs on the cylindrical gizmo. the top set are
connected to a doodah which looks like a probe on the end that slots
inside the top cylinder section, this is covered in a white paste
which i am guessing is a thermal conducting paste. I can only imagine
that these must be monitoring the temperature. The point of this is
the top attachment is quite loose, and i am guessing making a bad
connection.

Looking for the best thing to do here, i have thermal transfer
compound (for cpu to heatsink), i was going to smother the probe in
paste push in as far as it will go and pump silicone in behind it
which when it goes off should hold it firmly in place. Or should i try
to source a replacement part that may fir in snugly ? or do something
completely different.....

Well, first off look in the manual so you know what you're on about

Second, if it is the temperature sensor, check it's resistance

Thirdly, accept the fact that it's the pcb
--
geoff

On Thu, 27 Nov 2003 21:40:26 +0000, geoff wrote:

In message , David Hemmings
writes
Well the damn boiler has locked out yet again, before i call out an
engineer again, i had a good poke around insdie the boiler (have
previoously opened up to thoroughly clean inside).

Well i noticed one thing, the water pipe at the left hand side at the
front has two sets of wires going to small cylndrical sections
attached to the water pipe. the bottom set has the wires affixed into
blocks that push onto tabs on the cylindrical gizmo. the top set are
connected to a doodah which looks like a probe on the end that slots
inside the top cylinder section, this is covered in a white paste
which i am guessing is a thermal conducting paste. I can only imagine
that these must be monitoring the temperature. The point of this is
the top attachment is quite loose, and i am guessing making a bad
connection.

Looking for the best thing to do here, i have thermal transfer
compound (for cpu to heatsink), i was going to smother the probe in
paste push in as far as it will go and pump silicone in behind it
which when it goes off should hold it firmly in place. Or should i try
to source a replacement part that may fir in snugly ? or do something
completely different.....

Well, first off look in the manual so you know what you're on about

Second, if it is the temperature sensor, check it's resistance

Thirdly, accept the fact that it's the pcb

Every other boiler you would go for then sensors, switches,
connections and 'stats _first_.

--
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

In message , David Hemmings
writes
On Thu, 27 Nov 2003 21:40:26 +0000, geoff wrote:


Well, first off look in the manual so you know what you're on about

Second, if it is the temperature sensor, check it's resistance

Thirdly, accept the fact that it's the pcb

Plumber, funnily enough did not leave the manual, just the thickies 1
page leaflet, basically saying for anything at all call out a
plumber/potterton engineer. Also had a hunt around on the internet
for a manual with no joy

Otherwise i would be in full faculty of the facts and not such a dumb
ass question :|

Will check resistance, any ideas on what impedance it should have ?

yep i am just trying a few cheap options first ....

Do you have a fax ?


--
geoff

In message , David Hemmings
writes
On Thu, 27 Nov 2003 21:40:26 +0000, geoff wrote:


Well, first off look in the manual so you know what you're on about

Second, if it is the temperature sensor, check it's resistance

Thirdly, accept the fact that it's the pcb

Plumber, funnily enough did not leave the manual, just the thickies 1
page leaflet, basically saying for anything at all call out a
plumber/potterton engineer. Also had a hunt around on the internet
for a manual with no joy

Otherwise i would be in full faculty of the facts and not such a dumb
ass question :|

Will check resistance, any ideas on what impedance it should have ?

yep i am just trying a few cheap options first ....

I had 50 Suprima pcbs go out today !!!!!!!!
--
geoff

Top device is the temperature thermister.......thermostat if you like.
Bottom one is the overheat thermostat.
By all means look for loose connections but really you need to add a little
more info:

Will the boiler run after you have reset it?
When does it lockout?........on start up.......when up to temp.......other?
Try and find a pattern.

Have fun
Skip

I have one of these boilers. I didn't have the manual either. I contacted
potterton who sent out the complete documentation pack for no charge. Crap
boiler but reasonable customer service - in my experience.

Rob

In message , David Hemmings
writes
On Fri, 28 Nov 2003 23:00:56 -0000, "Skip"
wrote:

...

boiler started going from very intermittent lockouts to a very regular
occurence over a period of several months, had been asking an
acquaintence (corgi reg/plumber) to come around to have a look - the
original installer being very ill with asbestosis, anyway he still
hasn't come around after about 10 months.

Things i have

not

tried,


Googling "Suprima lockout problem"


--
geoff