Logic Boiler intermittent F1 fault

[Febeerck]

I am getting an F1 fault code in my Logic Boiler. I have checked and this shows up as being low pressure.

However the pressure isn't showing as low. Currently at between 1.5 and 2 bar. I had added some water to the system to check that the pressure needle wasn't stuck it did move.

I have bled the radiators, but they were fine.

One thing I haven't done is added any inhibitors for a long time.

The fault is also intermittent. The heating comes on for a bit then goes off with the F1 code.

 

[ianmcd]

Probably a pressure sensor fault, especially if you have dirty system water

 

[Febeerck]

Thanks, do you think then I need to drain and clean out the system then?

 

[ianmcd]

How would I know I havent seen your system water , only you have

 

[shambolic]

Or water dripping onto switch from flue