LA/HA High

Evo LA/HA Fault Code

Also written as LAHA — same fault.

The Evo LA/HA fault code means: your boiler has become too hot and has shut down as a safety precaution to prevent damage.. It appears on 1 Evo 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: Overheat reset (With V9 Primary Control PCB, will display 3 horizontal lines and will not attempt to refire until the temperature in the heat exchanger drops below 50oC)
Typical repair cost £120-350 (including labour)

DIY fix possible

Check that all radiator valves are fully openEnsure the boiler pressure is between 1.0 and 1.5 barWait for the unit to cool down below 50°C before attempting to reset

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Evo models that show the LA/HA fault code

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

Source

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

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