How much does it cost to fix Chaffoteaux error code 2b?

Typical repair cost for the Chaffoteaux 2b fault is £150-250 including labour.

2b High

Chaffoteaux 2b Fault Code

Q: What does the Chaffoteaux 2b fault code mean?

Your boiler is struggling to circulate water, which is causing a loud noise because the internal pump has stopped working.

Also written as 2B — same fault.

The Chaffoteaux 2b fault code means: your boiler is struggling to circulate water, which is causing a loud noise because the internal pump has stopped working.. It appears on 3 Chaffoteaux models in our database.

Technical description: Boiler noisy - Pump not running

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 2b fault code

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

Celtic 2 24 Rsc Repair: £150-250
Celtic 24 HE Repair: £220-£450
Sterling FF Repair: £150-300

Source

Chaffoteaux 2b 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