Pump running and boiler fired up all the time

[Notebook]

Hi
I just had to replace the 3 way valve and the pump.

The valve works fine - heating just the water or ch rads if selected.

I changed this yesterday. However last night was aware that I think that the pump was continually running and also the boiler running.
I don't think this is correct?
Is this controlled by a stat on the tank?

also

I turned off isolation valves above and below the pump to change it and also left (top of tank) and right of the valve(pipe going under floorboards).
There is also another going from the bottom of the tank to in between the pump and valve.

all these I have turned back on. Is this correct?

any help appreciated

[sonray ltd]

would say you have a wiring problem.

[Notebook]

Originally Posted by sonray ltd

would say you have a wiring problem.

In what way?
What should I check?

[Mike Jackson]

You need to check the wiring that you've done against a wiring diagram. You may find that there are compatibility issues between new and old components. It all depends on the age of the system and the components that you have swapped.

Mike