error code F27 on Vaillant ecotec pro 24 pcb board replaced and fixed.

Описание

Wanted to share this video with any one that has a vaillant ecotec pro 24 with error code F27.
Be careful to check the serial code as there are 2 types of pcb for this model a 2012 and pre 2012 model.
Mine is the 2012 model serial number 0020108264.
The pcb board I bought off ebay for £50 reconditioned comes with 1 year warrenty.
I replaced the pcb board and it fixed the problem.
Hopes this helps any one else with the same problem.