How much does it cost to fix Grant error code sHr?

Typical repair cost for the Grant sHr fault is £140-£260 including labour.

sHr High

Grant sHr Fault Code

Q: What does the Grant sHr fault code mean?

Your boiler has detected an electrical fault with its internal temperature sensors and has stopped running as a safety precaution.

Also written as SHR — same fault.

The Grant sHr fault code means: your boiler has detected an electrical fault with its internal temperature sensors and has stopped running as a safety precaution.. It appears on 2 Grant models in our database.

Technical description: HP flow sensor short / HP return sensor short

What causes the Grant sHr fault?

This fault occurs when the boiler's control board receives an impossible electrical signal from the sensors that monitor the water temperature. The most common reason is that the internal wiring or the sensors themselves have developed a short circuit, often due to natural wear or moisture ingress. Because the boiler can no longer safely monitor how hot the water is getting, it shuts down immediately to prevent overheating.

Typical repair cost £140-£260 (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 sHr fault code

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

Source

Grant sHr 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