Boiler won’t refill, but pressure hasn’t dropped

[dan_the_plumber]

Supply pipe could have been partially frozen.
BTW...And it’s not a fantastic idea, but if you were to open the filling loop the pressure Guage on the boiler would show you the pressure you’ve got coming out of the ground.
You might not be able to get more than 1.25bar into heating system if you just haven’t got more mains pressure available.
In any case 1.25 bar is what your heating system should be set to

 

[Kdi]

Thanks Dan. Seems it may have been a frozen pipe. Filling loop does let the pressure rise higher than 1.25, but as you say, I'm happy to let it sit there. It was a particularly cold day when I posted.

Supply pipe could have been partially frozen.
BTW...And it’s not a fantastic idea, but if you were to open the filling loop the pressure Guage on the boiler would show you the pressure you’ve got coming out of the ground.
You might not be able to get more than 1.25bar into heating system if you just haven’t got more mains pressure available.
In any case 1.25 bar is what your heating system should be set to