Boiler / CH trouble

dans6490_2

Water pump in airing cupboard comes on with boiler and after approx 10 mins shuts off, then pipes start to bang. Does this sound like a new pump required? seems strange that it would work for 10 mins then shut off? local plummer hit the pump with a screwdriver and it worked for a week but same problem now and the trusty knock with a screwdriver sadly no longer works. boiler is approx ten yrs old so thinking of replacing the lot. any advice greatly appreciated.

square-eyes

It sound like you may have air in the system. If this gets trapped in the pump then everything stops. It doesn't do the pump much good either. Have you changed anything in the CH system recently? If you don't have any automatic air venting system and you are not sure how to go about it, then a good CH engineer could help. I think 10 years old for a CH system is not old at all. I have just replaced an 18 year old gas boiler that was still going strong even after a builder hit it with an excavator. The only other parts I have replaced are the pump and motorised valves. They were about 10 years old.

Canucklehead

Hi

Pump is failing replace it. System might be full of sludge which will hasten pump wear ,but a lot of people dismiss the idea that it needs flushing.

Corgi Guy.

dans6490_2

Thanks for the advice, been quoted £300 for a powerflush and £300 for the repair? a friend of a friend has said he would powerflush and fit a boiler that i would supply, for £1000, so im thinking that for £1000 work and a £600 boiler i would be better off replacing the lot. worried that the problem is just the tip of the iceberg? not sure wether to repair old or replace with new.

square-eyes

If you have a worn pump and sludge then a new boiler may not help. The boiler may cost only £600 but the flue will cost up to £100 extra. A "Friend" installing it will not be able to issue a certificate if they are not Corgi registered. I think I would start with a new pump and system flush before shelling out for a properly installed new boiler. I have just had a new boiler installed and it cost £1650 installed by a Corgi engineer. That did NOT include any pump, programmer or motorised valves.