Apollo 40 Si Boiler cuts out

[Apollo40]

My boiler cuts out after 20-30 mins when on ch.
I've changed the "Hi" stat, but still got same fault.
any ideas?

 

[namsag]

More info req does it cut out when just on low /does it thump and bang before it cuts out / how long before pilot will relight (if its pilot model ) . Can you still hear the pump running when it cuts out , does it just do it on heating or on hot water as well

 

[Agile]

If its the pilot light which is "cutting out" as a result of the boiler overheating then I would be measuring the flow temperature. That would be most likely if it ran fine on the low setting and only gave the problem on the "high".

However, it could be that there are other issues associated with the pilot light and I would also be checking those but they are CORGI jobs.

Tony

 

[Apollo40]

Thanks for replies.
I've only noticed it on Hi, Never used it on Lo.
(Just switched it to Lo and it shut down).
No banging, it just cuts out.
I usually have to restart it manually after about 30 mins.
Pump carries on running.

 

[gas4you]

Perhaps the pump over run stat is knackered. Can you hear the pump running on when the boiler is hot after it goes off?

 

[Apollo40]

Dave,
Yes, but I haven't timed it.

 

[gas4you]

Ok, forget that then for now.