Locating LEDs for Boiler Failure Diagnosis (1 Viewer)

[monzer]

Repair guy wants me to record the flashing light sequence when my boiler fails to light. This should identify where the problem is.

Of course now that I need it to fail, it is behaving impeccably It has lit first time the last couple of days.

So preparing for the next failure can anyone tell me where these led's are located. On this photo I have removed the small plastic cover but it's too hard to see if there are led's there. Is this where they should be?

 

[HarryML7]

I have a different Truma boiler however the led is located on the circuit board which in my case is behind a similar plastic cover.

 

[monzer]

Forgot to mention it's a Truma C3402