Recent content by bigrad

Not much changed. With the hot water set at II and the tap half open the boiler behaves. Turn the tap full on and the boiler overheats AAAaaaaaaaaargh. I cant understand how, with more cold water going through the heat exchanger, it overheats. Is there a flow sensor that increases the gas as the...

of the 7 radiators, it only needs two to be siezed and I cant opperated with just one rad on. Two siezed radiator valves doesnt tell you anything about the pipe work or radiators. I get the one radiator test, to see if the same thing happens with CH loop only. BUT I have now changed both...

Cant tell, with just one rad operating the valves at siezed

When I run the hot water at differing rates and at differing settings, the water is "ketteling" in the boiler, then the system shuts down. Logic tells the water in the boiler to hot water heat exchanger loop in over heating. Is this a simple fix of replacing the hot water limit switch visible...