pilot goes out after 10mins banging

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Manchester
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United Kingdom
wonder if anyone can help...

We had some banging noises a week or so ago and suspected the pump was the problem. We have microbore pipes and the pump looked pretty old. I gave it a knock with a hammer and it worked for a few more days then gave up the ghost - so i have now replaced it - like for like.

It was a good fit with no leaks and i set the pump speed to the same as the previous one. However when i started the heating up the pipes starting clanging and whooshing and our Glow-worm fuelsaver Mk2 boiler pilot light goes out after 10 mins or so.

Have bled air from rads and pump, but to no avail. :cry:

I suspect corrosion, sludge in the pipes...(The old pump looked pretty bad). Is this the case? How do i tackle it? Is a power flush necessary?

Please help.
 
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Did you put the pump in the right way round?

Did you open the pump valves up fully? Some types can snap off inside leaving the 'gate' in place. Was there something that didnt feel right when you opened the valves?

have you tried different pump speeds? how far does the hot water get?

I suspect that there is still air in there somewhere. I cant see the job so its up to you to figure out where it is and how to get it out. Did you open the vent near the cylinder? [if there is one]

Cant rule out a physical blockage of crud either.
Looks as though you will be busy sorting this problem out
 
:D

Thanks for the help Slugbabydotcom - the pump was indeed the wrong way up. Even though I bought the same type of pump, it was a later model and the flow direction was set the other way.

This helped solve the problem, but after further investigation we got in a plumber to replace the Thermo-couple, which was causing overheating and banging. Even he was confused by the pump - eventually conceeded that I had put it in the right way at last.

Ta for the advice, take care.

Al
 
coombsie11 said:
:we got in a plumber to replace the Thermo-couple, which was causing overheating and banging.

A thermocouple cannot cause "overheating and banging" !

The flow direction is set by the arrow on the body.

The writing on the head can be rotated to read in any direction that you choose.

Tony
 
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coombsie11 said:
. Even though I bought the same type of pump, it was a later model and the flow direction was set the other way.


sniff sniff is that sheep or bull???
 

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