it started with the red light flashing quickly on the hot water (heating not affected) then the radiators seem to cool down a bit and then a loud noise was coming from the boiler. could this be the fan? i have used the pressure key to let some water/air in by turning the grey knob anti-clockwise. I turned the boiler back on and it was ok for about 10 mins, then the noise came again. Any ideas?
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Worcester Combi
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