Vaillant Ecomax 824/2 E

[micktheframer]

Hi all,

Does anyone know what fault code E 12 means on the above boiler, one of my colleagues reckons its something to do with the pump, I'm not convinced though, what do you reckon?
I've got to attend tomorrow....

Cheers

Mick.

 

[Agile]

Whatever it means if the diverter is OK then its probably the airswitch !

Tony

 

[micktheframer]

Cheers Tony I'll bare that in mind...

 

[Agile]

No, I was somewhat joking as 98% of faults I attend on that model are the diverter and after changing it I usually get called to a failed airswitch a few months later.

You will check it in the book but it is probably an unexpected thermal condition, perhaps caused by a blocked pump or blocked HE. Sometimes its nothing obvious but changing the NTCs ( as a pair ) will fix it although they test OK at room temperature. Perhaps the curve can get out of step?

Unfortunately there is little incentive to look for faults once the boiler is fixed and changing the NTCs has cured it. They almost always need to be changed if its been run dry by the tenants.

I sometimes think they are just a little too sensitive.

Someone else will probably tell us exactly what the code list says but remember thats only what the boiler "thinks" is wrong.

Tony

 

[weareleeds]

Are you sure it comes up e12 I have an ecomax 828/2 & have just checked manual & all fault codes begin with f but there is no f 12
Maybe i've drunk too much today