E31 High

Warmflow E31 Fault Code

The Warmflow E31 fault code means: your boiler is having trouble talking to the control panel or thermostat, meaning it cannot receive the instructions it needs to provide heating and hot water.. It appears on 3 Warmflow models 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: Remote Control Communication Error — damaged remote control cable or remote control fault; consult Service Engineer
Typical repair cost £120-£350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Warmflow models that show the E31 fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026