E 22 Emergency

Chaffoteaux E 22 Fault Code

Also written as E22 — same fault.

The Chaffoteaux E 22 fault code means: your boiler is unable to safely vent exhaust gases, so it has stopped working to prevent any risk of fumes entering your home.. It appears on 1 Chaffoteaux model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Faulty air pressure switch
Typical repair cost £150-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Chaffoteaux models that show the E 22 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Chaffoteaux E 22 fault code information on this page is sourced and cross-checked against the official Chaffoteaux service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026