Warmflow combi water pressure problem

[Bullyfuller]

Hi i wonder if anybody can help ? I drained down my warmflow boiler for a new rad , now its needs 3 bar pressure to trigging boiler back into life but my mains is only 2.5 ! Any ideas

 

[exedon2]

Which model of boiler ? Combi?

 

[SimonG]

It will.be the combi. Normally the low pressure sensor resets between 1.5 and 2.0. The issue with this combi is that the filling loop and pressure gauge are connected and the low pressure sensor is on the store.
Seen issues with the flex connector getting blocked with crap and not being able to fill the boiler but the gauge says it is.