Baxi 105e Expansion Vessel failed?

[Brockk]

I spoke too soon! It worked for a bit after a few hours the rads went cool - I guess because of the pressure in the vessel. Emptying it and re-filling/pressurising it again has them back on it so at least that's something. There was no water pooling at the top of the diverter valve either so that's a good sign!

I'll order the expansion vessel and let you all know how I get on

Still curious why the diverter valve cartridge seems to be different - I am guessing Baxi made some variations of this boiler? (I noticed that my diapghram is different too - most 105e's seem to have the bigger one whereas mine has the smaller one).

My diverter valve looks like this:

But most I have seen (in YouTube vids) look more like this:

 

[ianmcd]

My GC number is: 47 075 09

Your boiler is a 105e instant, not a 105e, they are similar but not the same boiler

 

[Brockk]

Thanks Ian - is there much difference between the two? I'm guessing the 'instant' means it has a pre-heat function whereas the non-instant don't?

 

[ianmcd]

Thanks Ian - is there much difference between the two? I'm guessing the 'instant' means it has a pre-heat function whereas the non-instant don't?

The instant uses the expansion vessel as a sort of pre heat store, the 105e expansion vessel will not fit your boiler they are different

 

[Brockk]

Ah right, thanks! So will this expansion vessel fit my boiler?

Baxi 248722 Expansion Vessel with Storage for Combi Instant & Potterton Performa | eBay

Baxi COMBI INSTANT 105. Baxi COMBI INSTANT e 80.

www.ebay.co.uk

It looks like lit might from the manual and this video:

Although I notice in the manual it says: "To replace the expansion vessel and pre-heat store it is necessary to remove the boiler from the wall" but in the video they say it does not : /

Edit:

According to this page https://www.baxi.co.uk/trade/products-parts-and-accessories/parts/parts-arena it is the same part number (248722) but it has the cover on it whereas the one on eBay does not - does it look ok to you all?

 

[ianmcd]

Although I notice in the manual it says: "To replace the expansion vessel and pre-heat store it is necessary to remove the boiler from the wall" but in the video they say it does not : /

All depends on the flue and clearance to the ceiling above

 

[ianmcd]

Ah right, thanks! So will this expansion vessel fit my boiler?

yes if it has two pipe connections it is the correct one the 105E only has one connection

 

[Brockk]

There's plenty of clearing and the flue can be removed easily enough (it's not fixed as far as I remember, sp can be unscrewed then pushed out temporarily). I did read one thread where someone managed to get it out sideways, so I suppose that might also be an option.

yes if it has two pipe connections it is the correct one the 105E only has one connection

Great stuff, thanks!

 

[cross thread]

No chance of removing sideways, if room above and flue removed they will come out from above. Disturbing the flue will require the boiler checking by a registered engineer .