My ch boiler only seems to be cutting in when hot water is requied,I had to turn my HW cylinder stat right up to 80 to get the rads to get hot, I noticed earlier in the day when I hit plus 1 hour for heating on the main central heating control that even though the amber light illuminated on the panel the green boiler light did not fire up and the rads did not get hot as normal only warm I suspect that once the hw in the tank gets up to the temp on hw stat I the rads will go warm, normally within 15 mins the downstairs rads are all hot any advice would be appreciated.My system is well due for a service the boiler is around 9 years old, the actual rads and pipework much older
Any help would be appreciated Thanks
Any help would be appreciated Thanks