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Hi ChrisR - New pump already installed. Boiler shutting down even though return pipe is cool. If I switch bypass valve to heat the water in the cylinder only, everything works fine until outer casing of boiler becomes excessively hot again. When it is switched to water only, the temp of the...

Hi All, Had a problem with a blocked heat exchanger on a Barlo Balmoral gas boiler recently which I rectified with help from this forum. However, I've noticed recently that the outer casing of the boiler becomes very hot after 20 minutes and the thermostat appears to cut in even though the...

Made the same mistake a few weeks ago but they seem to be working fine - don't know if it effects efficieny however. :oops:

Thanks ChrisR - :) :)

I wish to install 2 radiators to a newly built conservatory and luckily the main 3/4inch pipes from the boiler are conveniently located. I plan to connect plastic 1/2 pipes to these using compression fittings. how does the plastic pipe (i think its called qualpex) fit into a brass compression...

Whatever it was Chris, I now have heat, hot water and have my fingers crossed!!

Got heat exchanger back yesterday - says he sound a "spring-like " device which was partially blocking the outlet pipe. Thought it might be used to regulate the flow of water through the exchanger. System is not working fine again. Thanks for the advice over the past few days - I've learned alot...

Ok - So I should go with tap water and Fernox Mb-1 when I get the heatexchanger back today (hopefully!). Will keep you posted. :)

Oilman, ChrisR: Many thanks for all the invaluable help over the past few days. Once the system is ready to be filled, I'll add the fernox to the water - was also thinking of using rainwater to fill the system.

Thanks ChrisR - I've actually removed it and given it to a pal who has equipment he can connect it to and hopefully clean it out. Why do you think it became blocked again in such a short period of time? It was like new a month ago - would the additive I used in the water have caused it. When I...

Flushed the system with an air compressor and no blockages found in the pipework. Checked the heat exchanger again and the flow is definitely slowed and this appears to be the problem. I will try again to unblock it but I may need a replacement - does anyone know if this can be got for my boiler...

Tried a more powerful pump this morning - no improvement: boiler overheats and shuts down after 1 minute. Power flush is the next option.

I think you are confirming my suspicions oilman! The pipes are underground and I have found alot of sludge, solid matter in the pump casing each time I remove the pump. I connected a garden hose with good pressure to the system today but it did not solve the problem. Tomorrow, I will try a...

Thanks for reply oilman - the system is 14 years old - we live is a hard water area, there was alot of sludge etc in the system but I have flushed it on several occasions over past few weeks. The old pump was a wilo 25/60 but the current one on checking is a 25/40. would this be the problem...

Hi everyone, Ihave a problem with my Barlo Balmoral boiler for past few weeks.(open vented system) Initially became noisy and then would shutdown immediately after switching it on. I took it apart and found that the heat exchanger was completely blocked with lime/deposits. A car radiator...