How much does it cost to fix Grant error code RED flashing (Reset button)?

Typical repair cost for the Grant RED flashing (Reset button) fault is £120-250 including labour.

RED flashing (Reset button) High

Grant RED flashing (Reset button) Fault Code

Q: What does the Grant RED flashing (Reset button) fault code mean?

Your boiler has disabled itself for safety after multiple failed attempts to start the burner, and it now requires a specific cooling period or a professional reset to clear the lock.

Also written as REDFLASHINGRESETBUTTON — same fault.

The Grant RED flashing (Reset button) fault code means: your boiler has disabled itself for safety after multiple failed attempts to start the burner, and it now requires a specific cooling period or a professional reset to clear the lock.. It appears on 5 Grant models in our database.

Technical description: Reset push-button locked after being pressed five times in succession without burner restart

Typical repair cost £120-250 (including labour)

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 RED flashing (Reset button) fault code

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

Source

Grant RED flashing (Reset button) 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