What does the Johnson Starley OVERHEAT fault code mean?

Your boiler has become too hot and has automatically shut down to prevent damage to the internal components.

How much does it cost to fix Johnson Starley error code OVERHEAT?

Typical repair cost for the Johnson Starley OVERHEAT fault is £90-280 including labour.

Ensure all radiator valves are fully open and not turned off.

Appliance requires cooling down. Includes checks for overheat sensor, service valve positions, water levels, and air in the system.

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

Each noise points to a different fault.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.