High
E.04 – .06 on Baxi Performa

Your boiler has shut down because it is getting too hot inside, which is likely caused by water not moving through the system or a blocked vent.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Permanent fault. Critical flue gas temperature value reached, no circulation or sensor fault.

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.

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful