Recent content by BobSTR

Water from a radiator bleed is pretty clear - perhaps a slight straw colour. Having said that I've no doubt there's a fair amount of debris lurking at the bottom of some of the radiators. Last time I drained the system was probably about 3 years ago - and got some nice black stuff out then. (Yes...

So the 3-way valve on our central heating system has been sticking (stuck on hot water - nothing coming to the radiators). Need to frequently manually move the valve. A common problem right? Well - a few years ago I replaced the actuator (Danfoss Randall HSA3). That seemed to help for a while -...