Water went into my Baxi 105e boiler and it stopped working. Flame failure light was flashing. An engineer came round to fix my boiler, he initially said no power was going from the board to the boiler so he changed the pcb board and it still would not work it made all the noises it would usually make except for the sound of the flame lighting up. He then replaced the ignition lead and gave it a little clean i thought after this all would be ok. After doing that the flame ignition light is still flashing he says it may be the gas valve. Out of interest can someone who is a qualified plumber tell me if this person sounds as though he knows what he's doing. Obviously I can't tell if he's just messing around because i know nothing about boilers - Very cold lady ((((bbbrrrrr)

Lady Chilly, November 2008

Take my advice get a new boiler even if you get it fixed I guarantee you it will fail again. there old boilers alway braking down..

john, October 2016

If its sparking well, the fan must be running and will have proved to the PCB that the air pressure switch is working or the PCB wouldn't call for a spark anyway.

If its sparking but not igniting and simply moves to reset with a flame failure error, the PCB can be checked to ensure there's 230v at the board for the gas valve. If not, the PCB is likely to have gone.

But if there is voltage here, are we still then getting voltage at the plug end of the lead which connects to the Gas valve? If not, the lead has gone, but if you are, the gas valve is likely to have gone. My thoughts are that the gas valve has gone and needs replacing. Approximately £90 for a new one. Fitting should be around £40 for an hour's work.

Does your engineer sound like they know what they're doing? Dunno, check the Gas Safe Register online and confirm they're registered to work on CEN1 and that they're currently in-date. You can also check on the back of their Gas Safe pass for the same information. Remember, it's illegal for anyone who's not Gas Safe Registered to work on Gas appliances...

Chaumont Gas Services, February 2011

I'm currently having the same problem, what was your fix please?

http://www.diynot.com/forums/viewtopic.php?t=251389

Please help, its freezing!!

raynos, November 2010

my baxi 105e has flame faiure light on i have changed electrodes serviced boiler still dont work any ideas anyone thanks

freezing in swansea, February 2010

if it is the gas valve he should be able to test this with out an probs maybe you shold try some one else

tim, January 2009

Had a boiler engineer in who says that we need a new diverter valve for our baxi 105e boiler charging £150 for part plus fitting about £55 does this sound right we have hot water but no radiators are working

Blue Manager, November 2008

does the boiler try to spark and ignite ?? if the fan is running and it does not ignite poss the pressure switch ... has he checked the pressure switch ?

matt, November 2008

has he check the selrctor/reset switch

b, November 2008