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Dec123

Hi everyone just wondering if anybody has an idea about whats going on with my combi boiler....my combo goes on and off every few seconds....i have got 1.5 water pressure and I have already taken off the heat exchanger and cleaned it...when I set the boiler to just DHW nothing at all happens....when i set it combined CH it does what you will see in the video link below.....

I have tested the NCT and it is functioning well at 11500 ohms of resistance so its not that

I have also opened the control box and pressed down the diagnostic switches which you will see in the video

I am an electrician (formerly) now school teacher therefore handy enough on things..was able to fault find the nct from the board rather than disconnect it etc..so I am hoping that someone could help me find a way to fix this without having to call someone in...video link below ...thanks all..


https://youtu.be/zyG4EWrY4AI
 

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