E270 High

Baxi E270 Fault Code

The Baxi E270 fault code means: your boiler has sensed it is getting too hot too quickly, likely because water isn't moving through the system properly.. It appears on 24 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: Circulation fault (dry fire).

What causes the Baxi E270 fault?

This fault occurs when the boiler's internal sensors detect the temperature rising far too quickly, often because there is no water flow to carry the heat away. The most common reasons are a failed circulation pump that can no longer push water through the pipes, or a blockage caused by a build-up of debris or limescale. In some cases, it may also be caused by air trapped in the system or a blockage in the heat exchanger.

This fault is frequently seen in autumn when the heating is turned on for the first time after summer, as pump components can seize up during long periods of inactivity.

Typical repair cost £150-350 (including labour)

DIY fix possible

Check that the boiler pressure is between 1.0 and 1.5 bar on the gauge; top up if it is too low.Ensure all radiator valves and isolation valves under the boiler are fully open.Bleed all radiators to remove trapped air that might be blocking water flow.Turn the boiler off and back on again to see if the fault clears.

Find a Gas Safe engineer

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

Gas Safe Register →

Baxi models that show the E270 fault code

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

Source

Baxi E270 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