How much does it cost to fix Chaffoteaux error code E 26?

Typical repair cost for the Chaffoteaux E 26 fault is £120-220 including labour.

E 26 High

Chaffoteaux E 26 Fault Code

Q: What does the Chaffoteaux E 26 fault code mean?

Your boiler is having trouble communicating with the probe that measures the temperature of your hot water storage tank, which will likely prevent your hot water from heating up properly.

Also written as E26 — same fault.

The Chaffoteaux E 26 fault code means: your boiler is having trouble communicating with the probe that measures the temperature of your hot water storage tank, which will likely prevent your hot water from heating up properly.. It appears on 1 Chaffoteaux model in our database.

Technical description: Tank sensor short 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.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Chaffoteaux models that show the E 26 fault code

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

Minima HE Repair: £120-220

Source

Chaffoteaux E 26 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