Hi all,
I looked for a thread with the same issue but didn't find anything with the same specific issue.
The most similar issue I found was this: https://www.diynot.com/diy/threads/can’t-separate-hot-water-and-central-heating.536028/
I have a similar boiler set up to the poster of that thread. I've sent a DM to the gentleman that helped that person too, but this is quite urgent.
I'll keep it as concise as possible:
- We went on holiday, didnt turn boiler off / to holiday mode, stopped getting hot water from boiler, staryed using immersion backup
- Got boiler's annual service while it wasnt working with hot water tank, they identified the issue as a faulty motor in one of the two 2-port valves.
- Got it fixed this week. The plumber identified the same issue. Replaced the 2 port valve - it wasnt exaxtly the same as the one before. Previously both were exactly the same.
- At first the new issue caused was that if the boiler was on at the mains, no matter what we did, the CH and HW would be on full blast until the boiler was switched off at the mains.
- Now, the boiler can be on without kickstarting CH & HW, but rather than the boiler starting both, the controller does that instead. As soon as you turn CH on via the controller, both vome on full blast until the CH is switched off on the controller
- Also, any hot water in the tank built up during the CH being on is lost very quickly after the CH is turned off. HW seems to be actively taken out of the tank the moment CH is switched off.
It's a terrible, terrible nuisance.
The plumber seems pretty clueless on the issue, hes been around once to make it so the HW & CH arent constantly on whenever the boiler is on. He'll be back round tomorrow evening to see if he can fix it but in pur text messages he seems to have no clue, ans tried to blame it on the way the wiring of the thermostat is set up - butnit worked perfectly before he touched it, and he says hes rewired it exactly the same way.
If anyone can help I would so very grateful.
Thank you for your time.
I looked for a thread with the same issue but didn't find anything with the same specific issue.
The most similar issue I found was this: https://www.diynot.com/diy/threads/can’t-separate-hot-water-and-central-heating.536028/
I have a similar boiler set up to the poster of that thread. I've sent a DM to the gentleman that helped that person too, but this is quite urgent.
I'll keep it as concise as possible:
- We went on holiday, didnt turn boiler off / to holiday mode, stopped getting hot water from boiler, staryed using immersion backup
- Got boiler's annual service while it wasnt working with hot water tank, they identified the issue as a faulty motor in one of the two 2-port valves.
- Got it fixed this week. The plumber identified the same issue. Replaced the 2 port valve - it wasnt exaxtly the same as the one before. Previously both were exactly the same.
- At first the new issue caused was that if the boiler was on at the mains, no matter what we did, the CH and HW would be on full blast until the boiler was switched off at the mains.
- Now, the boiler can be on without kickstarting CH & HW, but rather than the boiler starting both, the controller does that instead. As soon as you turn CH on via the controller, both vome on full blast until the CH is switched off on the controller
- Also, any hot water in the tank built up during the CH being on is lost very quickly after the CH is turned off. HW seems to be actively taken out of the tank the moment CH is switched off.
It's a terrible, terrible nuisance.
The plumber seems pretty clueless on the issue, hes been around once to make it so the HW & CH arent constantly on whenever the boiler is on. He'll be back round tomorrow evening to see if he can fix it but in pur text messages he seems to have no clue, ans tried to blame it on the way the wiring of the thermostat is set up - butnit worked perfectly before he touched it, and he says hes rewired it exactly the same way.
If anyone can help I would so very grateful.
Thank you for your time.
