How much does it cost to fix Grant error code Power supply?

Typical repair cost for the Grant Power supply fault is £0-120 including labour.

Power supply High

Grant Power supply Fault Code

Q: What does the Grant Power supply fault code mean?

Your boiler has lost electrical power and cannot start or run any of its functions.

Also written as POWERSUPPLY — same fault.

The Grant Power supply fault code means: your boiler has lost electrical power and cannot start or run any of its functions.. It appears on 1 Grant model in our database.

Technical description: Check that fused spur for heating system and boiler is switched on – check that the electricity supply has not failed

Typical repair cost £0-120 (including labour)

DIY fix possible

Check if the main electrical fuse box (consumer unit) has tripped and flip the switch back up if necessary.Locate the fused spur switch near the boiler and ensure it is switched to the 'On' position.Check if other appliances in your home are working to rule out a general power cut.

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Grant models that show the Power supply fault code

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

Vortex Blue Repair: £0-120

Source

Grant Power supply 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