How much does it cost to fix Chaffoteaux error code 40 50 60 80?

Typical repair cost for the Chaffoteaux 40 50 60 80 fault is £150-250 including labour.

40 50 60 80 Medium

Chaffoteaux 40 50 60 80 Fault Code

Q: What does the Chaffoteaux 40 50 60 80 fault code mean?

Your boiler is struggling to switch between heating your radiators and providing hot water, which may cause your taps to run cold or your heating to stay on constantly.

Also written as 40506080 — same fault.

The Chaffoteaux 40 50 60 80 fault code means: your boiler is struggling to switch between heating your radiators and providing hot water, which may cause your taps to run cold or your heating to stay on constantly.. It appears on 2 Chaffoteaux models in our database.

Technical description: Distribution valve stuck on heating

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 40 50 60 80 fault code

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

Source

Chaffoteaux 40 50 60 80 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