Hi, I came across this forum in a Google search and I was impressed with the expertise offered with diagnosing issues with combi boilers, hopefully you can help me.
We are losing faith with our landlord's chosen heating engineering firm - they have now been out three times and seem unable to offer an appropriate solution to our issue.
Since around Easter, our combi boiler does not reliably provide hot water, so as you can imagine, shower time is a bit like russian roulette. Additionally, the pressure in the system drops quite alarmingly when we are trying to coax hot water out of it, as much as a bar in a couple of minutes. There does not appear to be any leaks in or around the radiators to explain it, and it definitely drops during attempts to use the hot water. There has always been a very slow degradation in pressure loss but now it is a lot worse. I try to top it up so that it doesn't get dangerously low; I've never seen what occurs when it does get too low (although if the pressure gauge is accurate I think I maybe should have done... another cause for concern?).
Our third engineer visit has diagnosed a faulty thermistor, would that explain the above issue? It doesn't seem likely to me, I can imagine it resolving the hot water problem but not the dropping pressure problem. I'd really appreciate any insight as it is hard enough to get them out in the first place, so when they go away again without resolving it, it just means another couple of weeks of cold showers
We are losing faith with our landlord's chosen heating engineering firm - they have now been out three times and seem unable to offer an appropriate solution to our issue.
Since around Easter, our combi boiler does not reliably provide hot water, so as you can imagine, shower time is a bit like russian roulette. Additionally, the pressure in the system drops quite alarmingly when we are trying to coax hot water out of it, as much as a bar in a couple of minutes. There does not appear to be any leaks in or around the radiators to explain it, and it definitely drops during attempts to use the hot water. There has always been a very slow degradation in pressure loss but now it is a lot worse. I try to top it up so that it doesn't get dangerously low; I've never seen what occurs when it does get too low (although if the pressure gauge is accurate I think I maybe should have done... another cause for concern?).
Our third engineer visit has diagnosed a faulty thermistor, would that explain the above issue? It doesn't seem likely to me, I can imagine it resolving the hot water problem but not the dropping pressure problem. I'd really appreciate any insight as it is hard enough to get them out in the first place, so when they go away again without resolving it, it just means another couple of weeks of cold showers