Potterton Combi 80 Keeps Cutting Out

hoorgi · 24 Oct 2004

The system usually makes a load gurgle then the 'Lock out' light, lights up whereby there is no hot water or heating. Once the 'reset' button is pressed, it starts working again and we get between an hour and 2 weeks use of the boiler before it happens again. It is very annoying.

Does anyone know what I can do about this?

kevplumb · 24 Oct 2004

by your description you have air in the system is the auto air vent open ?

hoorgi · 25 Oct 2004

Thanks for the reply. The cap on the top of the auto air vent appears locked solid and has a fair amount of scale. What would you suggest from here?

kevplumb · 25 Oct 2004

replace it
could try and get it loose if its scaled its been leaking
so see top
no middle ground not really expensive

ChrisR · 26 Oct 2004

If it was overheating due to air not being able to get out it wouldn't run for 2 weeks after you reset it.
COuld be the DHW flow switch is sticking open.
Next time it does it, drop the front and see if there's a bright red led on the circuit board. That light is on when the boiler thinks you're drawing water. If you aren't, then the rads will get exptremely hot before it cuts out.

Could just be a dirty pilot injector though!

hoorgi · 21 Nov 2004

Thnaks for the advice. There was indeed a bight light on the cicuit board, so I am having that switch replaced. The real plumber thought that the boiler did not have a 'pilot injector' as such.

How is the weather in 'Antarctica'?

kevplumb · 21 Nov 2004

about as s*ite as the falklands

tomcubi · 15 Aug 2010

Hi Hoorgi,

I hope you manage to solve the problem.
Can you please post what the problem was about and its solution?

Many thanks

kevplumb · 15 Aug 2010

6 year to late

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Potterton Combi 80 Keeps Cutting Out

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