Baxi · 600 Combi
E110 boiler fault code
Baxi 600 Combi legacy generation
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What E110 means
Maximum boiler temperature was exceeded for the rate of temperature rise, or the safety thermostat sensor tripped.
Safe check
Read and note E110 and any visible temperature or pressure display. Do not reset a recurring safety trip.
When to contact an engineer
Arrange a Gas Safe registered engineer to diagnose circulation and safety-thermostat operation, including internal pump or electrical checks.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.
Source and provenance
- Baxi Professional error-code table · legacy Baxi 600 Combi & System group
professional error-code table
Checked 29/09/2026; the online table publishes no revision