Motor fails to run High

Grant Motor fails to run Fault Code

Also written as MOTORFAILSTORUN — same fault.

The Grant Motor fails to run fault code means: your boiler has no power arriving at the unit, meaning it cannot start the burner to provide heating or hot water.. It appears on 1 Grant model 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 electrical supply to boiler check on/off switch is on – it should be neon lit
Typical repair cost £0-120 (including labour)

DIY fix possible

Check that the boiler's main on/off switch is set to the ON position and see if the neon light is glowing.Check your home's consumer unit (fuse box) to see if a circuit breaker has tripped.Ensure the external fused spur switch (usually near the boiler) is switched on and the fuse inside it hasn't blown.

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Grant models that show the Motor fails to run fault code

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

Source

Grant Motor fails to run 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