How much does it cost to fix Grant error code Amber neon lit?

Typical repair cost for the Grant Amber neon lit fault is £0-£120 including labour.

Amber neon lit High

Grant Amber neon lit Fault Code

Q: What does the Grant Amber neon lit fault code mean?

Your boiler has stopped working because the water pressure inside the system has dropped below the required level.

Also written as AMBERNEONLIT — same fault.

The Grant Amber neon lit fault code means: your boiler has stopped working because the water pressure inside the system has dropped below the required level.. It appears on 1 Grant model in our database.

Technical description: Low pressure cut-out activated

Typical repair cost £0-£120 (including labour)

DIY fix possible

Locate the external filling loop, usually two silver flexible hoses connected to the pipework under the boiler.Open the valves on the loops slowly until you hear water entering the system.Watch the pressure gauge on the front of the boiler and close the valves once the needle reaches the green zone, typically between 1 and 1.5 bar.

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Grant models that show the Amber neon lit fault code

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

Vortex Combi 70 Repair: £0-£120

Source

Grant Amber neon lit 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