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The actuator is a Sunvic. The whole thing was fitted as new when the house was built 7 years ago. Would it be debris in the pipes causing the valve to stick or simply wear and tear. All water coming from rads and the pump bleed point is clear - not black which I have been told means some...

I had what I thought was a faulty 3 port valve actuator. I removed the head and tried to turn the valve manually on it's spindle. It is incredibly stiff, and the only way I can move it is to use a pair of pliers. I would imagine that for the motor to operate the valve properly, the valve should...

Thanks Chris. The pipes going out from the top of the boiler are boxed in (and decorated.) Anyway I might be able to bleed it nearer the tank? I think the air is circulating through the pump as I can sometimes hear a swooshing noise about 10 minutes after the boiler is switched on in the...

Thanks Bradley Is this the hot water storage cylinder? Any ideas on how to remove the airlock?

I have a 7 year old Gloworm Ultimate boiler. When the boiler starts in the morning, I have it set to provide both HW and CH. After about 5 minutes, when the water temp in the boiler is only lukewarm, the high limit stat kicks in and disables the boiler. I have to wait for a couple of minutes...