How much does it cost to fix Remeha error code E6?

Typical repair cost for the Remeha E6 fault is £120-£210 including labour.

E6 High

Remeha E6 Fault Code

Q: What does the Remeha E6 fault code mean?

Your boiler's internal thermometer has stopped working correctly, meaning the system can no longer tell how hot the water is and has shut down for safety.

The Remeha E6 fault code means: your boiler's internal thermometer has stopped working correctly, meaning the system can no longer tell how hot the water is and has shut down for safety.. It appears on 11 Remeha models in our database.

Technical description: Flow sensor shorted or open circuit

What causes the Remeha E6 fault?

This fault occurs when the boiler's control board loses communication with the temperature sensor on the main water pipe. The most common reason is that the internal sensor has suffered an electrical failure or the wiring connecting it has corroded over time. Since the boiler cannot safely monitor how hot the water is getting, it shuts down to prevent the system from overheating.

Typical repair cost £120-£210 (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 E6 fault code

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

Source

Remeha E6 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