Ideal logic gas valve

[anz]

Put the analyser probe in the flue outside on the air side to make sure seals were ok.. Started doing the fault again... It seems like it doesn't take much of a blockage to cause the fault.

 

[ambrosia]

or the rubber seal for the flue turret

was right, do i win a prize

 

[anz]

was right, do i win a prize

It looks like you were... I should have checked more in depth first time round... I just thought it'd be impossible to be that... Because how could it possible move after 3 years of being ok.

 

[anz]

Faults come back in :-(

 

[GasmanxxxR1]

Change the washer thats on the top of the gas valve going to the venturi, I had the same fault and this fixed it

 

[anz]

Change the washer thats on the top of the gas valve going to the venturi, I had the same fault and this fixed it

That makes sense, can you get it as a separate part?

 

[ambrosia]

change the whole flue

have you tried taking a reading with a combustion analyser on the air side of the flue, on a ideal i think you have to do it from outside, if the air side is contaminated it proves i'm right and this time i want a prize

 

[anz]

Had a spare flue, changed the whole thing.. Still no different

 

[anz]

Even ideal don't know what else to check, I've gone through absolutely everything.

 

[anz]

I even stripped it down again, checked the washer that gas man is talking about, slightly worn but seemed ok.. Put it back together, still same fault.

 

[ambrosia]

have you tried putting an analyser on the air side of the flue,

do it just to satisfy my determination that its the flue,
if the o2 doesnt drops below 20.9 on the air intake then you can tell me to shut-up and to forget about the prize

 

[anz]

Lol, will try it next time I'm there.. But flues all clear. ;-)

 

[Elgordo]

Have you tried monitoring gas pressure at the test point on the isolating valve ? If it's varying in sympathy it would point to either meter regulator or gas valve ..?

 

[anz]

Have you tried monitoring gas pressure at the test point on the isolating valve ? If it's varying in sympathy it would point to either meter regulator or gas valve ..?

Yes, tried that 20mb under the boiler, not massively fluctuating when boiler running, same at the gas meter.

 

[anz]

Tried the black washer, new injector, cleaned venturi again.. Made no difference.

I'm ready for giving up on this one.

 

[quality]

I would be leaning toward the fan being at fault

 

[anz]

Already replaced it.. Made no difference

 

[quality]

wow

 

[anz]

I must have spent in excess of 10 hours in total on this.

 

[quality]

Its obviously air/fuel related or vibration

 

[Elgordo]

Have you tried loosening the casing to see if it goes away ? I have found the two spring catches at the base can make the difference between an L2 fault showing and proper running .Is it heating water in this mode? and does it persist when in low fire minimum rate .. hate it when they leave you feeling useless like that !!

 

[Sharp Point]

What about the hydraulic side of things?

 

[buckley plumb]

Does the fan voltage fluctuate

 

[Elgordo]

Just another thought ... is the heat exchanger flushed clean , they collect a lot of sediment over time and it can lodge and restrict flow of combustion products

 

[anz]

Fault still occurs, even with the cover off, heat only boiler but also does it in minimum, fault is definitely on gas side.. I absolutely thoroughly cleaned the heat exchanger, 3-4 jugs of water went through it... Didn't make much of a difference.