Biasi M90F Diverter Valve Rattle/Clicking

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As subject, the motor unit on my diverter valve is clicking, it is also affecting the boiler, sometimes the boiler doesnt ignite for the CH, im thinking this is because the valve isnt getting into position correctly, also, if the CH is on for example, and you turn the DHW on, you can hear the diverter valve moving, but then obvuiusly something is wrong with it becasue it then turns the gas off, and the boiler sort of does a restart before trying the valve again, you can hear it clcicking. Usually it does recover and the gas ignites and away you go, but sometimes the light on the front will flash quickly which means a fault. Anyone seen this before?

Sometimes though when the CH is on, the boiler can sometimes not light, even though its been on and the pump is still running, so not sure whats causing that as the dHW hasnt been used.

Simple fix perhaps or time to swap it for a new one?

Thanks
 

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