How much does it cost to fix Chaffoteaux error code E 34?

Typical repair cost for the Chaffoteaux E 34 fault is £120-220 including labour.

E 34 High

Chaffoteaux E 34 Fault Code

Q: What does the Chaffoteaux E 34 fault code mean?

Your boiler has identified a broken connection or faulty sensor in the vent system meant to carry waste gases away, so it has safely shut down to prevent unsafe operation.

Also written as E34 — same fault.

The Chaffoteaux E 34 fault code means: your boiler has identified a broken connection or faulty sensor in the vent system meant to carry waste gases away, so it has safely shut down to prevent unsafe operation.. It appears on 1 Chaffoteaux model in our database.

Technical description: Flue pipe sensor open circuit

Typical repair cost £120-220 (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 34 fault code

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

Minima HE Repair: £120-220

Source

Chaffoteaux E 34 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