Vaillant EcoTec 831 Dead

[mikeerhymes]

Hi All

My 831 looks like it's given up. All working fine after 1:30hrs of use today, now all of a sudden it's completely dead, nothing on the display and no sign of life at all even after a power cycle.

Power getting to the board ok, fuse ok on the board.

Anything else I can check or is this a new circuit board job?

Thanks

 

[easyflow]

Check wiring harnesses to PCB earths etc.
Make sure all contacts are clean and free from corrosion.

 

[Agile]

So what did you use to check the power?

 

[mikeerhymes]

Check wiring harnesses to PCB earths etc.
Make sure all contacts are clean and free from corrosion.

Thanks, unfortunately doesn't look like any issues with wiring following the loom. Earths have good contact, no visible corrosion at all.

So what did you use to check the power?

A multimeter?

 

[Agile]

Multimeter connected between which points?