3 year old BAXI 105e problem when DHW is selected pressure is 1.1bar all lights on except central heating.temperature lights rise as a demand for hot water is requested up to 70o along with pressure up to 1.5 bar,this is OK for a few minutes then flame light flickers and all other lights go out excluding power and DHW which stay on along with 30o light which flashes,nothing else happens untill reset switch is operated,then the whole cycle starts again. This also happens similarly when central heating is selected. CAN ANYONE HELP IT MAKES IT DIFFICULT TO HAVE A SHOWER.

ROSCO, May 2007

The 30 light is above the symbol of a flame with a diagonal line through it. This is the lockout/flame failure light.
It suggests that the fault lies in the gas or ignition phase and therefore comes under gas regulations/ corgi registered only.
One thing you can try is to observe the ignition electrode through the inspection glass( look to the left ) and see if the spark continues right up to when it trips out.
If it does it may be a flame recognition fault, and if it doesn't it could be an electronics fault or flue stability problem.It very much depends on how long it runs for before tripping out.
This information might help the engineer you speak to to decide what parts to bring with him (or her). Sorry i cant be more precise..

T.h.s, May 2007