vailant eco tec plus 642 f28 help !!

hi have any engineers had a f28 on vailant ecotec plus 642 ,spoke to vailant technical yesterday they said it was the board as i had no voltage from board to gas valve changed board she fired !!,customer calls back today f28 they reset and it works but not on the time clock ,called vailant back now they say its the gas valve thats faulty and its blown the board great !! new board blown

any engineers that have come across this one ?

You should register for the closed Combustion Chamber part of the site and ask trade questions like this there.

Tony

hi mate yeah i know i just signed up to this site yesterday ,seems good lots of engineers on here , i am waiting for my approval to combustion chamber have sent over my card details , turned out it was meter govner transco changed for me today, fluctuating pressures i had a standing of 38 mbar this morning tested again and had 15 shockin ,after that boiler workin well and the board is ok relief !! thought the gas valve might have been damaged

happy customer !!