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One of the rads on our microbore open vented and pumped system has never really heated up properly. It is slow to heat and the bottom stays just warm. My first thought was sludge so took the rad off and flushed, then balanced the system as well as possible - no improvement. Next I changed the...

I've posted recently regarding noise problems, further investigation has narrowed things down a bit. It's a 20yr old microbore system with Gloworm Fuelsaver, 3 port valve, etc. When the system is running on CH + HW all is well. When I shut off CH the system clatters and bangs around the air...

In spring we had a problem with banging/clattering around the air separator/cold water inlet pipework. Used some boiler noise reducer throughout the summer, the system was running daily for HW and no noises. On starting the CH & HW to check it out before winter there was no improvement, noises...

When I shut down the central heating (HW still on) using the room thermostat, the 3 port v/v lever moves to the mid position. I have read that the HW only position should be right over (lever floppy) Does this indicate my wiring is reversed? If so does it matter? Thanks for any wise words.

Hi All My system is microbore 9 single rads, Gloworm fuelsaver. Myson aereject. All the rads on microbore have TRVs. So a low volume system. The bathroom rad is on 1/2" pipe and didn't have TRV until a friend ( a plumber) advised me to fit a TRV when I could. This rad is directly above the...

Hello folks, Hope someone can help with a diagnosis, My RGI is beaten but will carry out repair if I can identify the fault. The boiler is Glowworm Fuelsaver 35f. Briefly, It fires up normally and runs for 33 secs. then shuts down. After approx 90secs it fires up again and repeats the same...