What does the Potterton Overheat LOCKOUT fault code mean?

Your boiler has detected that it has become dangerously hot and has automatically shut itself down to prevent damage.

How much does it cost to fix Potterton error code Overheat LOCKOUT?

Typical repair cost for the Potterton Overheat LOCKOUT fault is £120-250 including labour.

Manual Lockout. Temperature at the flow pipe is too high. Potential overheat thermostat or wiring fault.

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

Almost always a stuck diverter valve on combis.

Each noise points to a different fault.

Work through these before the call-out.