ATAG error codes
and precautions.
Select your brand, search for the code on the display and open its card to see the meaning, likely cause and safe steps.
Select your brand
Verified selection for ATAG iC / iS. Codes are not universal: confirm the model and generation in the exact manual.
15 error codes found
The questions we get asked most
Where can I find my exact boiler model?
Check the identification label accessible without dismantling, the invoice or maintenance report. Keep the range name and all suffixes: VCW 286 or TOP 22/28 alone may not be enough.
Does Bulex F22 always mean low pressure?
No. The ThemaCondens manual cited in our article associates F.22 with insufficient water or pressure. The older ThermoMaster F24E, FAS28E and F28E manual gives excessive pressure for F22. Check the model before topping up.
Why record the subcode with Bosch EA?
The subcode can distinguish different conditions. The official Bosch lookup cited in our article gives different descriptions for EA-227 and EA-511. Check applicability to your model; do not automatically apply those results to an older Junkers.
Does my Radson radiator show a boiler code?
An ordinary radiator does not have a boiler diagnostic display. Identify the boiler or electronic controller actually showing the message, then look up its brand and model.