Grant Combi Boiler - Demand light Always on

[Cona44]

Hello
I have no problems with my boiler at moment but i have noticed that the Demand light is always on…as far as i recall, this used to never be the case and only came on when required.

Could anyone advise what kind of issue i might be facing here?

 

[Exedon]

Almost certainly stuck flow switch turn off supply clean paddle and replace
On some models there is a flow restrictor that can give same symptoms if its failed.
If in a really hard water area switch may need changing..

 

[Cona44]

Thanks for the reply