What does the Ariston 1 03 fault code mean?

Your boiler has detected that the water is not flowing through your heating system correctly, so it has shut down to prevent overheating.

How much does it cost to fix Ariston error code 1 03?

Typical repair cost for the Ariston 1 03 fault is £120-250 including labour.

Check that all radiator valves are fully open.

Insuffi cient circulation

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.

Lockout fault with a reset-needed pattern.