BoilerFaultCodesIntergas E29 Fault Code
The Intergas E29 fault code means: your boiler's electronic brains have encountered an internal software or communication error and can no longer control the heating safely.. It appears on 6 Intergas models in our database.
Technical description: Internal control error
What causes the Intergas E29 fault?
This fault occurs when the boiler's internal computer chips fail to talk to each other correctly or lose programmed data. It is usually caused by a physical hardware failure within the main control board or a sudden electrical surge that has corrupted the system's memory.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Intergas models that show the E29 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas E29 fault code information on this page is sourced and cross-checked against the official Intergas service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026