28/04/2026
A tricky fault find on this one 🔍🔥
Customer was having issues with some radiators not working at all, while others were only getting lukewarm — yet the boiler flow and return were reaching temperature very quickly.
Even with all radiators turned off, the boiler was still behaving the same… so something wasn’t adding up.
After a fair bit of investigation (and lifting more floorboards than I’d like to admit 😅), I traced the pipework back to a previous bathroom renovation. The radiator had been moved, and in the process the pipework had been incorrectly linked together, creating a loop in the system.
This was causing the heating water to bypass the system instead of circulating properly.
✅ Fault traced and diagnosed
✅ Pipework loop removed
✅ Redundant pipework capped off
✅ System recommissioned and running as it should
Three other engineers had previously attended and couldn’t find the issue — sometimes it just takes persistence and a bit of digging (literally).
If your heating system isn’t behaving as it should, don’t ignore the signs — there’s always a reason behind it.