26 Low

Grant 26 Fault Code

The Grant 26 fault code means: your boiler is currently performing a mandatory safety cooling cycle after shutting down, so it is just waiting for a few minutes before it can restart.. It appears on 1 Grant model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: WAIT POST PURGE: Period of time after burn down is complete to ensure no unburnt pellets ignite.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Grant models that show the 26 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Grant 26 fault code information on this page is sourced and cross-checked against the official Grant service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026