What does the Potterton 24 fault code mean?

Your boiler has switched itself off because it has detected that the water inside has become or is at risk of becoming too hot.

How much does it cost to fix Potterton error code 24?

Typical repair cost for the Potterton 24 fault is £90-180 including labour.

Can I fix Potterton fault code 24 myself?

Check that your radiator valves are open and not blocked by furniture.

Potterton 24 Fault Code: What It Means & How to Fix It

Technical description

Safety Thermostat

What causes this fault?

This fault occurs when the water temperature inside the boiler exceeds a safe limit, triggering a safety shut-off to protect the internal components. It is most commonly caused by a circulation problem, such as a failing pump or a blockage, which prevents the heated water from leaving the boiler quickly enough.

This issue is more frequent during the first cold spell of autumn, when pumps that have been idle all summer often seize or struggle to move heavy sludge.

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 switched itself off because it has detected that the water inside has become or is at risk of becoming too hot.

Technical description

What causes this fault?

Engineer required

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