Baxi Solo2 Boiler ignition problem

[Blossomdeary]

Hi,
I have been having a problem with the boiler ignition on my Baxi Solo2. The pilot light is good and strong and the boiler will fire up but will only stay alight for however long it feels like it. Sometimes it will stay alight for several minutes but in that time you can here it cutting in and out before it eventually goes out permanently for any length of time it fancies. This affects heating and hot water. We've already tried replacing the pressure switch and the pilot light switch that talks to the circuit board controling the boilers firing up or not and neither of these has worked. Now getting desperate as the possibles left are the expensive ones...... Can anyone help please?

Thanks folks!

 

[adlplumbing]

could be the fan starting to go i am afraid

 

[Blossomdeary]

Many thanks for the suggestion but when I had it looked at this evening but my plumber said that the fan is working fine(no cutting out etc).

 

[bellairaphon]

has he checked venturi aps tubes