What does the Remeha 31 fault code mean?

Your boiler has lost the ability to accurately measure the water temperature, so it has safely shut itself down to prevent overheating.

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

Typical repair cost for the Remeha 31 fault is £120-200 including labour.

Manufacturer manual

Temp.sensor fault

From this model's manual

Verified against the Remeha Quinta Ace 45 installation & service manual, page 36.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like 31: no call-out fees, no surprise bills.

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Lockout fault with a reset-needed pattern.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.