We've just moved into a new place, and within hours have had issues with the heating.
The system seemed to be working initially, producing heat and hot water as you might expect.
At some point in the afternoon the wife wanted to fill the fishtank, which requires warm water. Ran the tap at the kitchen sink, and it went warm for 5 seconds then stone cold. Turned tap off, waited, tried again, still stone cold, so she asked me for a look.
I had a look at the boiler, which had "u9" on the display, which reading online means its reached a primary temperature of 109c. The temperature was just sitting there, at 109c. With the tap running or not running, nothing changed.
So i pressed the power button on the boiler to turn it off, and then turned it back on. It whirred into life for maybe 2 or 3 seconds, the temp dropped down into the 90's and it stopped again. Power cycled it again and it dropped a bit further, but this time the boiler then started up properly and seemed to run the heating normally again, with the temp settling in the 60's.
Tried the tap again at this point, and the temp very quickly shot back up to 109c and it shut down again.
So i turned it all off and left it, cold nights sleep, brrr!
Next morning we called the solicitor to report the issue. The previous owner suggested trying to power the boiler off at the mains for a while and see if that helped it, and arranged a plumber to attend this morning.
Tried that. Once back on, the heating worked fine, but the hot water was still intermittent. We tried it a few times thru the day, sometimes it worked fine, other times it repeated its warm for a few seconds, then cold and "u9" on the display.
This morning, it has worked perfectly. We've both had a shower without issue. Guy came out and had a look. Said the pressure was a little high so he fixed that but otherwise didnt really find anything wrong. He said the DHW thermostat was "a bit high" and that he turned it down, but i'd already looked at that myself and it was at "e" (which appears to be around 2/3-3/4 on the dial) and not max.
I guess my main concern is this issue is the start of some component failing, and i'm going to get lumped with a bill very soon when it finally gives up. So i'm wondering if these symptoms are indicative of a particular fault. The fact the temperature seemed to get "stuck" at 109c seems somewhat odd to me. Especially when your drawing off water.
Any thoughts would be much appreciated.
The system seemed to be working initially, producing heat and hot water as you might expect.
At some point in the afternoon the wife wanted to fill the fishtank, which requires warm water. Ran the tap at the kitchen sink, and it went warm for 5 seconds then stone cold. Turned tap off, waited, tried again, still stone cold, so she asked me for a look.
I had a look at the boiler, which had "u9" on the display, which reading online means its reached a primary temperature of 109c. The temperature was just sitting there, at 109c. With the tap running or not running, nothing changed.
So i pressed the power button on the boiler to turn it off, and then turned it back on. It whirred into life for maybe 2 or 3 seconds, the temp dropped down into the 90's and it stopped again. Power cycled it again and it dropped a bit further, but this time the boiler then started up properly and seemed to run the heating normally again, with the temp settling in the 60's.
Tried the tap again at this point, and the temp very quickly shot back up to 109c and it shut down again.
So i turned it all off and left it, cold nights sleep, brrr!
Next morning we called the solicitor to report the issue. The previous owner suggested trying to power the boiler off at the mains for a while and see if that helped it, and arranged a plumber to attend this morning.
Tried that. Once back on, the heating worked fine, but the hot water was still intermittent. We tried it a few times thru the day, sometimes it worked fine, other times it repeated its warm for a few seconds, then cold and "u9" on the display.
This morning, it has worked perfectly. We've both had a shower without issue. Guy came out and had a look. Said the pressure was a little high so he fixed that but otherwise didnt really find anything wrong. He said the DHW thermostat was "a bit high" and that he turned it down, but i'd already looked at that myself and it was at "e" (which appears to be around 2/3-3/4 on the dial) and not max.
I guess my main concern is this issue is the start of some component failing, and i'm going to get lumped with a bill very soon when it finally gives up. So i'm wondering if these symptoms are indicative of a particular fault. The fact the temperature seemed to get "stuck" at 109c seems somewhat odd to me. Especially when your drawing off water.
Any thoughts would be much appreciated.