DIY Doctor UK DIY Forums

Ok so i have a y plan with 3 rads . one in the living room, one in the hall, and one in the bathroom.
Last night I switched the heating off at the controller, and turned the stat right down so it wouldnt come on during the night ( timer on controller is not working )
the hall rad was on full all night, and the living room rad was luke warm. When i turned the heating on, all the rads came on as normal. When i turned it off again, all went off except the hall one.


what the hecks going on ? and any ideas what i need to do ?

You say the central heating was off and the thermostat was turned down - what about the hot water was that turned on ?

Is the actuator on the 3 port valve working ?

is the 3 port valve turning freely ?

If the radiators are getting hot when hot water only is selected - then it's probably a fauly actuator.

So the hall radiator is always on - has this always been the same or has it just happened ? maybe last occupier piped that radiator into the hot water flow and return ?

The hall rad has just started doing this. So what do you think, replace the 3 port valve ? I am pretty sure i could manage this. Seen some cheap ones on Ebay too. Just a case of isolate and replace ?