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 ?
any engineers that have come across this one ?