Baxi 105e not firing

[guitey]

I have had a problem before where I had to change the diaphragm, it isn't that.
This is for both heating/hot water, when I turn on the boiler the fan starts and I can hear the air pressure switch switch but no flames. I put my gas tester on the inlet and it is fine, but nothing on the outlet side.

Anyone any suggestions?

 

[Stingray13]

If the fan is running and your getting no error lights APS is proving i would hasard a guess at the PCB would be if it was a baxi 80Eco which are very simlar as i did one a few weeks ago with this fault.

But are there any error lights etc?

 

[mrgas]

What gas tester did you use on which inlet?
What measurments did you get?

 

[guitey]

What gas tester did you use on which inlet?
What measurments did you get?

I used my gas test gauge on the inlet on the gas valve. It read 20mb.

 

[guitey]

If the fan is running and your getting no error lights APS is proving i would hasard a guess at the PCB would be if it was a baxi 80Eco which are very simlar as i did one a few weeks ago with this fault.

But are there any error lights etc?

ahh yes error light above the 50, I don't have instructions but it looks like a picture of a fan.

 

[namsag]

Then it is very likely the air pressure switch faulty

 

[guitey]

Then it is very likely the air pressure switch faulty

I can hear the air pressure switch connecting though. Also tried blowing into it manually and still nothing but it is making the connection.