Example of Baxi Duo Tec Cracked Exhaust on Vertical Flue

[arran197]

Went to service this Duo Tec today, thought, nice quick job, just a boiler in and out within 30 mins. Wrong.

Boiler was noisy on start up, the FGA confirmed my thoughts. Before pulling the flue apart I checked the condense trap, checked the heat exchanger and did the FGA on minimum with the combustion door open, which caused the boiler to operate a little better.

Pulled the flue apart in the loft and found the exhaust cracked. I think this is about 4 I've come across now. But this boiler was only fitted 32 months ago. It always seems to be the first flue extension and appears to be where the spring keeps the gap between the outer and inner flue. The crack gets worse and worse, until, like this one, it forms a hole and allows a mix of products and air to create huge quantities of CO.

 

[JAH HEATING]

These the ones with the adaptive gas valve ?

 

[arran197]

No, this is off a HE A Duo Tec, but I believe they used the same flue.

 

[Billy Bob Bob]

No, this is off a HE A Duo Tec, but I believe they used the same flue.

HEA and GA use diffrent flues never had this problem,have you talked to baxi yet?

 

[arran197]

HEA and GA use diffrent flues never had this problem,have you talked to baxi yet?

Oh right, I'll be honest, not looked at a GA flue. Don't really come across them too much. Spoke to Baxi in what way? Told them I'm coming across this fault? If so, no I haven't. How do you go about that?

 

[Billy Bob Bob]

Oh right, I'll be honest, not looked at a GA flue. Don't really come across them too much. Spoke to Baxi in what way? Told them I'm coming across this fault? If so, no I haven't. How do you go about that?

speak to technical and ask for a technical adviser/manager

 

[arran197]

Right ok. Might do, but would they want to see one at a property?

 

[Billy Bob Bob]

Right ok. Might do, but would they want to see one at a property?

possibly would if theres potential issues

 

[Pelsey]

I've seen this on a Potterton suprima HE, exactly the same but on a horizontal flue

 

[gassafe]

Maybe Ideal will then inform gas safe and make a technical bulletin for Us all!

 

[Ermintrude]

Maybe Ideal will then inform gas safe and make a technical bulletin for Us all!

Ideal ? Baxi would ideally! Seen ga and he flues mixed together, causing high co as the internals move on ga but not he so gap between internal seals. Ga flue has dimples for screws on collars .