BAXI 105 HE FLAME FAILURE

[steve32]

Air Pressure Switch

 

[raynos]

Air Pressure Switch

Pretty sure thats been replaced... so many parts replaced i've lost count! I'll find out tomorrow night.

 

[MarkRainbow]

If it's lighting it's unlikely to be the APS, has to be something to do with flame detection. If the APS didn't make, the boiler would never light.

I have seen a problem where the HT lead to the ignition electrode was broken. The spark could still jump the break in the conductor within the insulation and light the flame, but the current for flame detection couldn't, so the gas would shut off. BUT, it wasn't on this boiler, which has a separate flame detection electrode (in the case I describe, the ignition electrode was also used for flame detection) so may not be applicable here.

I would test the cable to the flame detection electrode for continuity and replace if necessary.

 

[raynos]

If it's lighting it's unlikely to be the APS, has to be something to do with flame detection. If the APS didn't make, the boiler would never light.

I have seen a problem where the HT lead to the ignition electrode was broken. The spark could still jump the break in the conductor within the insulation and light the flame, but the current for flame detection couldn't, so the gas would shut off. BUT, it wasn't on this boiler, which has a separate flame detection electrode (in the case I describe, the ignition electrode was also used for flame detection) so may not be applicable here.

I would test the cable to the flame detection electrode for continuity and replace if necessary.

That cable has been ordered and will be replaced tomorrow night. i hope its this simple!

 

[libby lou lou]

Why replace if it's been checked and okayed?, i think your flagging.

 

[raynos]

i always replace both
as baxmax said check the aps and polarity

aps Air Pressure Switch

Yes the APS has already been replaced, with no change in error

 

[powell30]

Maybe i am stating the obvious here but do you have your own registration? Competant?

If not you have already broken the law........this site doesn't facilitate diy gas.......other posters note this too

 

[raynos]

Maybe i am stating the obvious here but do you have your own registration? Competant?

If not you have already broken the law........this site doesn't facilitate diy gas.......other posters note this too

I'm not doing this work, my plumber is,
I'm asking because my plumber is at a loss...
I'm getting desperate and seeking advise...
I've had no heating for 10days now, please sympathise...
I'm competent, but not a law breaker!

Still cold in the meantime!

 

[Baxmax]

There is far to much confusion on this thread,i would suggest you get a competent engineer to repair your boiler as the "plumber " you have employed does not know what he is doing.
If you call Heateam They will have your boiler up and running within 30 minutes.

 

[bassmonster]

I know this is an old thread but I came across the exact same problem yesterday. It turns out the yellow and green wire connected to the condensate trap became wet. Once this cable was removed the boiler was fine. Just make sure this cable does not get wet.

 

[Gasguru]

I hope you haven't disconnected the wire...that would be defeating one of the safety devices.

 

[Agile]

Quite apart from that, early on he said that the wire had been disconnected and it still faulted.

The problem is that he had employed a "plumber" who had no idea about boiler fault diagnosis!

Tony

 

[ianmcd]

Quite apart from that, early on he said that the wire had been disconnected and it still faulted.

The problem is that he had employed a "plumber" who had no idea about boiler fault diagnosis!

Tony

No Tony read the post again the boiler that the wire was disconnected and still faulted was a different boiler in 2010, probably still going though cos they rebuilt it with all the parts they changed