BoilerFaultCodesIntergas 29 Fault Code
The Intergas 29 fault code means: your boiler's internal control board cannot safely communicate with the gas valve, preventing the system from igniting for your heating and hot water.. It appears on 7 Intergas models in our database.
Technical description: Gas valve relay faulty
What causes the Intergas 29 fault?
This fault occurs when the boiler's main control board detects a hardware failure in the electrical relay that manages the fuel supply. It means the system can no longer safely open or close the gas valve, so it shuts down as a protective measure to ensure gas cannot flow uncontrollably. The root cause is typically a component failure on the printed circuit board itself or a communication breakdown between the board and the gas valve.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Intergas models that show the 29 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Intergas 29 fault code information on this page is sourced and cross-checked against the official Intergas service / installation manuals for each affected model.
- Intergas Combi Compact ECO RF manual (PDF)
- Intergas Combi Compact HRE 36/30 manual (PDF)
- Intergas Compact HRE OV manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026