Problem with my Potterton Suprima 50 Boiler and locking out?

r2oo · 21 Aug 2006

Hi all, I'm new to this forum & know absolutely nothing about boilers & central heating so here's my problem.

We are having major problems with our Potterton Suprima 50 Boiler at the moment. We have no hot water or central heating as it keeps locking out even 2 mins after a re-set!

Luckily we have British Gas 3* cover & they have sent an engineer out who told us that the pcb was faulty & needed replacing, he did this with the new & improved pcb with the one multi coloured led but the problem persists. The Bg engineer has been back & scratched his head a few times!!! he then went up into the airing cupboard & looked at what I think was the pump? a square white box about the size of a tennisball connected to the mains & sat on top of a pipe. the box has a slider on the front sating Auto to the left & manual to the right. There are also 2 orange led's on top, one for hot water, one for central heating. Is this the pump??

The BG engineer seems to think that the pump is not switching or operating properly??? could this bea reason for the constant lockouts if th e pcb has been replaced?

is there anything else I should mention to him?

I look forward to your replies & advice.

Regards
R2oo

Agile · 21 Aug 2006

This illustrates the level of competence of BG staff!

You have benefited from his incompetence by having a £180 new PCB fitted at no extra cost to yourself!

The part you describe is the motor valve!

He would be better to look at the pump which may be a larger reddish or grey or bright green colour!

Its probably faulty. If you could spin the shaft it might get it working again. ( See FAQ )

Tony

r2oo · 21 Aug 2006

Hell that was quick Tony.....very impressed.
Is the pump also situated in the airing cupboard?

ChrisR · 21 Aug 2006

Could be, but not necessarily. If pump's dead you would expect overheating, whch would probably make a bubbling/boiling noise. Could be fauty sensors or one or two other things though.

Agile · 21 Aug 2006

Its a little difficult for me to say which pocket you keep your wallet in!

However the pump is probably either near the HW cylinder or near the boiler! Since its mounted on a pipe from the boiler it should not be difficult to find!

I will give you a clue apart from the colour! Its generally "roundish" !

It might also have one of the names, grunfoss, SMC, celsia, wilo, circulating pumps, but that would be a givaway!

Tony

r2oo · 21 Aug 2006

Since he changed the pcb< when the boiler fires up, just before it locks out it does some heavy banging & bumping. & the central heating doesn't work at all!

scatmanjohn · 21 Aug 2006

r2oo said:
Since he changed the pcb< when the boiler fires up, just before it locks out it does some heavy banging & bumping. & the central heating doesn't work at all!

I wonder if he wired the pump back up correctly as it gets its power via the boiler (or is supposed to)

r2oo · 21 Aug 2006

I wonder if he wired the pump back up correctly as it gets its power via the boiler (or is supposed to)[/quote]

He hasn't touched the pump yet. only replaced the PCB and then seems to have pulled the motor valve off the pipe mounting it was sat on!! don't know why?

corgiman · 21 Aug 2006

mmm

whats the betting he cocked up the wiring to the new board, if he did not pop the pump feed in the right place then it aint going to work

ChrisR · 21 Aug 2006

Did he put the top back on the motorised valve??!

Here's a pump :

r2oo · 22 Aug 2006

ChrisR said:
Did he put the top back on the motorised valve??!

He has actually pulled the whole motorised valve off the pipe and left it hanging over the pipe!
The pump is definately in the Airing cupboard under the motoerised valve.

One thing I noticed this morning apart from the usual lockout on the boiler was that the pipework on which the motorised valve is located was absolutely boiling. Yet still no hot water! on closer inspection the motorised valve plastic cover looks warped & cracked, as if it has melted slightly sitting over the heat.

Got another BG engineer coming today, anything I should tell him?

Agile · 22 Aug 2006

Tell him we think the pump is not working!

If he is over 23 he may not welcome being told how to do his job!

Tony

r2oo · 22 Aug 2006

He's comong tomorrow to replace the Motorised valve!

scatmanjohn · 22 Aug 2006

r2oo said:
He's comong tomorrow to replace the Motorised valve!

Why did he not do it today?

Surely he had one on his van.

r2oo · 22 Aug 2006

scatmanjohn said:
Why did he not do it today?

Surely he had one on his van.

Aparently not, he had to order one!!

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Problem with my Potterton Suprima 50 Boiler and locking out?

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