Hi all.
Can anyone please help ? Recently when hot water is on the flashing green light stops on permanently on the boiler. I have 2x2 myson 2 way valves on an unvented system in the airing cupboard. One for hot water and one for central heating. The 2 way valve stops on permanently for hot water with the pump consequently running. Even though no hot water is being drawn off. I have left hot water turned on for 12 hours but still nothing turns itself off. Boiler fires up OK when necessary but always goes into flashing green mode.
Now central heating when selected works fine. When boiler turns itself off on to steady red light 2 way valve for central heating turns itself also. One guy came round and said it may be the pump over run on the PCB. Now these boards are bloody expensive and I have heard of people having board replaced but faults are still there. I am pretty handy with a mutimeter. I have changed the motorised head on the 2 way valve but fault is still there.
If it is the pump over run would this not be the case as the central heating works fine ? Anything else I can check myself ? I am ok with diy.
Thanks for reading this post and any help gladly appreciated !!
Can anyone please help ? Recently when hot water is on the flashing green light stops on permanently on the boiler. I have 2x2 myson 2 way valves on an unvented system in the airing cupboard. One for hot water and one for central heating. The 2 way valve stops on permanently for hot water with the pump consequently running. Even though no hot water is being drawn off. I have left hot water turned on for 12 hours but still nothing turns itself off. Boiler fires up OK when necessary but always goes into flashing green mode.
Now central heating when selected works fine. When boiler turns itself off on to steady red light 2 way valve for central heating turns itself also. One guy came round and said it may be the pump over run on the PCB. Now these boards are bloody expensive and I have heard of people having board replaced but faults are still there. I am pretty handy with a mutimeter. I have changed the motorised head on the 2 way valve but fault is still there.
If it is the pump over run would this not be the case as the central heating works fine ? Anything else I can check myself ? I am ok with diy.
Thanks for reading this post and any help gladly appreciated !!