How much does it cost to fix Remeha error code 31.?

Typical repair cost for the Remeha 31. fault is £150-250 including labour.

31. High

Remeha 31. Fault Code

Q: What does the Remeha 31. fault code mean?

Your boiler has stopped working because a sensor that measures the water temperature is reporting an incorrect or impossible reading, causing the system to shut down for safety.

Also written as 31 — same fault.

The Remeha 31. fault code means: your boiler has stopped working because a sensor that measures the water temperature is reporting an incorrect or impossible reading, causing the system to shut down for safety.. It appears on 3 Remeha models in our database.

Technical description: Temp. sensor fault. Short-circuit in flow temperature sensor.

Typical repair cost £150-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Remeha models that show the 31. fault code

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

Source

Remeha 31. fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026