E110 High

Baxi E110 Fault Code

The Baxi E110 fault code means: your boiler has shut down because it has detected it is getting too hot too quickly, usually caused by poor water circulation or trapped air.. It appears on 32 Baxi 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: Boiler max temperature exceeded for gradient (probable pump jammed or air in the circuitBoiler max temperature exceeded for overtemperature (probable pump jammed or air in the circuitSafety thermostat sensor tripped.

What causes the Baxi E110 fault?

This fault occurs when the water inside the boiler heats up so quickly that the safety sensors shut the system down to prevent damage. The most common cause is a blockage or a failed pump preventing water from moving through the pipes, but it can also be triggered by large air bubbles trapped within the unit.

This issue is more frequent in autumn when heating systems are switched back on after a summer of inactivity, which can cause the internal pump to seize or get stuck.

Typical repair cost £100-280 (including labour)

DIY fix possible

Check that your radiator valves are open and not turned to the off position.Carefully bleed your radiators to remove any trapped air from the system.Restart the boiler by turning the selector switch to the reset position for five seconds.

Find a Gas Safe engineer

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

Gas Safe Register →

Baxi models that show the E110 fault code

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

Source

Baxi E110 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