Atag 119 Fault Code
The Atag 119 fault code means: your boiler has detected that a small safety wire or bridge connection inside its control panel has come loose or is missing, preventing the system from starting.. It appears on 4 Atag models in our database.
Technical description: Link on X2 position 4 and 5 missing
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Atag models that show the 119 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Atag 119 fault code information on this page is sourced and cross-checked against the official Atag service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026