worcester 28i junior cuts out

[james131005]

does anybody know what is the problem with a worcester 28i junior.
it goes to burner for 10 seconds and then locks out.
Happens central heating

Thought it may be the flame sensor or ch thermister

 

[clf-gas]

What the pressure guage at.

 

[hav it]

pressure switches are very common on this boiler to fail. Come to think of it the boards are not much better..

 

[james131005]

1.5 bar