E31 High

Baxi E31 Fault Code

The Baxi E31 fault code means: your boiler has lost the digital connection to its control panel or remote thermostat, preventing it from receiving instructions to heat your home.. It appears on 1 Baxi model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Communication fault between PCB and remote control
Typical repair cost £150-250 (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 →

Baxi models that show the E31 fault code

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

Source

Baxi E31 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

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