What does the Alpha 0A31 fault code mean?

Your boiler has detected that a temperature reading from its internal water system is not what it expects, meaning it has safely shut down to prevent damage.

How much does it cost to fix Alpha error code 0A31?

Typical repair cost for the Alpha 0A31 fault is £150-250 including labour.

Alpha 0A31 Fault Code: What It Means & How to Fix It

Technical description

Flow sensor out of range. Sensor measures a temperature outside normal working range.

What causes this fault?

This fault occurs when the boiler's internal computer receives a temperature reading that is physically impossible or outside of its safety limits. It is usually caused by a chemical failure inside the flow sensor itself or a loose connection in the wiring that interrupts the electrical signal. Because the boiler can no longer accurately monitor how hot the water is, it shuts down to prevent the system from overheating.

Engineer required

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

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Your boiler has detected that a temperature reading from its internal water system is not what it expects, meaning it has safely shut down to prevent damage.

Technical description

What causes this fault?

Engineer required

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