LED off High

Grant LED off Fault Code

Also written as LEDOFF — same fault.

The Grant LED off fault code means: your boiler has completely lost power and is unable to turn on, meaning it cannot provide any heating or hot water.. It appears on 6 Grant models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: No power supply. No voltage to pump control electronics. Causes: Pump is not connected to power supply, LED is damaged, or electronics are damaged.
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 LED off fault code

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

Source

Grant LED off 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 7 July 2026