We had a separate problem recently ( relay had gone in the boiler) and the guy did mention that he wasn't sure what the previous installer had done. If it helps I could post a couple of pics of the plumbing arrangement.
I hope it is a wiring problem as I don't mind having a go, but I'd rather...
It may sound stupid but since we had a new boiler and cylinder in around 4 years ago I'm convinced it's always happened but I can't be sure. We tend to keep the immersion on and turn the radiators off in the Summer.
I'm not entirely sure, I will post a pic. Would the CH valve look similar, or better still where is it likely to be situated? I bow down to your helpfulness.
I'm sorry if this has been covered before, I'm trying my best to understand what's happening and I wonder if anyone could help.
The radiators are coming on when hot water is selected on the boiler. We have a 2 port valve near the cylinder and moves freely when hot water is selected, has...