What does the Alpha 0A80 fault code mean?

Your boiler is having trouble communicating with its internal temperature sensors, which means it cannot accurately measure how hot the water is and has stopped working as a safety precaution.

How much does it cost to fix Alpha error code 0A80?

Typical repair cost for the Alpha 0A80 fault is £120-220 including labour.

Alpha 0A80 Fault Code: What It Means & How to Fix It

Technical description

Flow and return sensor connection fault. Fault may occur after several minutes of boiler operation.

What causes this fault?

This fault occurs when the boiler's control board receives conflicting or missing data from the sensors that measure water temperature entering and leaving the unit. The most common reason is that one of these sensors has physically failed or the electrical wiring connecting them has become loose or damaged over time. Because the boiler cannot accurately track 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 is having trouble communicating with its internal temperature sensors, which means it cannot accurately measure how hot the water is and has stopped working as a safety precaution.

Technical description

What causes this fault?

Engineer required

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