Vaillant F61 fault code Boiler fault code, Faulty gas valve, faulty PCB, ecoTec, VU 656/4-5-H ecoTec

F61 fault code on Vaillant Commercial boiler VU 656/4-5-H ecoTec.
It was a faulty PCB.

[@muhammadgreen9711]

Nice to see you on the vaillant course last week 👍

[@MHKBuildingSolutions]

It was nice meeting you buddy.

[@MHKBuildingSolutions]

Thanks brother, it was a good informative course. Take care.