BoilerBuddy · Baxi guide
Baxi boiler fault codes and symptoms
BoilerBuddy helps you diagnose boiler problems, work through minor checks, and escalate major problems to a Gas Safe engineer. Start with the exact code and range shown on your appliance; meanings can differ between models.
From the fault-code directory
Common Baxi codes and symptoms
These examples link to existing records for their specific boiler ranges. Open the matching record for its full context and guidance.
Duo-tec Combi
Code E119: Low water pressure
Water pressure switch not operated; primary pressure below 0.5 bar.
600 Combi
Code E133: No flame established — gas off
E133 indicates that ignition or flame establishment was unsuccessful and the boiler has locked out.
600 Combi
Code E110: Flame rod / latch open
Maximum boiler temperature was exceeded for the rate of temperature rise, or the safety thermostat sensor tripped.
600 Combi
Code E118: Flow NTC — short circuit
Primary heating-system water pressure is low; the Baxi table defines this as below 0.5 bar.