How much does it cost to fix Grant error code ORANGE steady ON?

Typical repair cost for the Grant ORANGE steady ON fault is £120-250 including labour.

ORANGE steady ON High

Grant ORANGE steady ON Fault Code

Q: What does the Grant ORANGE steady ON fault code mean?

Your boiler is struggling to receive a stable electrical supply, which is likely being caused by fluctuations in the power coming from your home's mains.

Also written as ORANGESTEADYON — same fault.

The Grant ORANGE steady ON fault code means: your boiler is struggling to receive a stable electrical supply, which is likely being caused by fluctuations in the power coming from your home's mains.. It appears on 5 Grant models in our database.

Technical description: Frequency supply error

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 ORANGE steady ON fault code

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

Source

Grant ORANGE steady ON 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