I think it would help if you can provide a schematic and a couple of photos of your system, please.
My first guess is that your hot water circuit may be blocked with sludge, which might have been the original problem. Another possibility is an an airlock.
I think it's the valve because even when it's manually locked open on ab the tap water still doesn't get hot so I think it's not opening properly, even with the new actuator.
I still would like a professional opinion though before I change it.
Just to clarify as another person I spoke to thought I meant I had no water...
I have a water flow out of my hw taps, it just never gets hot.
I left just the HW supply switched on for a few hours the other day whilst I had to go out, when I got back, the actuator was really hot as if the heating or water was working and flowing but neither was.
So the power is getting to it, it's just not functioning. 😪
I took the valve off yesterday so I could see if it was blocked and also so I know how it works on the inside.
No blockage and it moves easy with my fingers, very rusty looking so I've ordered another, but nowhere had just the valve so had to buy one with an actuator on!
I'm just waiting to get the txt to say it's arrived so I can collect it.
BEFORE I FIT THE ABOVE, it's definitely not the thermostat on the water tank (immersion heater) is it? I can't see how it can be if the actuator is getting the signal but unable to move the valve, but I'd rather not have to spend the money on it, so this will be my only chance cos once it's fitted I can't take it off and take it back.
* My junction box *
This is exactly as it was before I started doing anything and I'm taking it as granted that it's all correct because it used to work for 5+ yrs when we had the new boiler installed.
THAT BEING SAID...
Why is there a grey wire going into the earth? T9 second from right
If I touch the screw with my screwdriver it lights it up saying it's live, I didn't think that was supposed to happen???
Bottom Row
1 = E - Mains + Boiler
2 = N - Mains + Boiler + WiFi
3 = L - Mains + Boiler + Controller
4 = Boiler/Black
5 = WiFi/Black
6 = Boiler/Grey - WT/Blue
7 = WiFi/Grey - Controller/Black
8 = Controller/Grey - WT/Brown
9 = E - Controller + WT
10 = Blank
Top Row
1 = E - Actuator + Pump
2 = N - Actuator + Pump
3 = L - WiFi/Brown
4 = Pump/Brown
5 = Actuator/White
6 = Actuator/Orange
7 = Blank
8 = Blank ???
9 = Actuator/Grey ???
10 = Blank
Thanks to everyone for your suggestions so far, and can someone let me know if that T9 grey cable is correct.
Cheers,
Woody