M
Mbear
It almost beat me. Story goes, i got there today, immediately I got told 2 engineers have tried but failed to sort boiler (one midweek, one ysterday),cust says the 1st engineer replaced the dead pump on a w/Bosch 24i, it must've been knackered, heating on and within an hr of him leaving the boiler stopped working (o/h stat), they got someone else out who reset the o/h stat and refilled/vented the system, same again, heating on and an hr later the stat popped. I like a challenge, but I felt like I could easily be no.3. Bp was 13mb hw and 5mb on ch, perfect I thought. There was obvious prp discharge and The exp vess was flat so I thought it may have been losing pressure and overheating when dry, i pumped it up, also the AAV was leaking, I had one so I changed it. I ran the heating and went inside (boiler was in an outhouse) to warm up and wait on result. The rads got ridiculously hot, untouchable in fact, overheat again! I just happened to look at the ch ntc, the clip was still on the pipe but only just and the ntc wasn't touching it, Bingo! I reckon the first mob must've disturbed it whilst changing the pump. Could've easily missed it and been no.3 but I was chuffed, although to be fair I got a bit lucky, But they do say you make your own luck 🙂. Anyone else had similar tricky faults recently ?