BoilerFaultCodesBaxi E55 Fault Code
The Baxi E55 fault code means: your boiler has lost its fine-tuning and needs to undergo a self-calibration process to ensure the gas and air are burning efficiently.. It appears on 23 Baxi models in our database.
Technical description: Calibration required
What causes the Baxi E55 fault?
This fault occurs when the boiler's internal computer loses track of the precise balance between gas and air needed for a clean flame. It often happens after a power cut, a sudden change in gas pressure, or if the internal components have worn slightly over time, causing the system to lose its 'fine-tuning'.
DIY fix possible
Press and hold the 'R' (Reset) button for at least 2 seconds.Wait for the boiler to complete its automatic calibration sequence, which may take several minutes.Ensure all radiator valves are open to allow the boiler to disperse heat during the process.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Baxi models that show the E55 fault code
Click a model for the full fault code list and model-specific repair notes.
- 400 Combi (range) Repair: £80-180
- 800 Repair: £100-280
- 80e Repair: £90-180
- Assure Repair: £90-180
- Bermuda Repair: £90-180
- Duo-tec Combi Repair: £0-120
- Eco Compact Repair: £90-180
- Eco Elite Repair: £100-250
- EP Repair: £90-250
- Netaheat Repair: £100-250
- Performa Repair: £100-250
- Profile Repair: £100-£250
- Profile Prima Repair: £100-£250
- Statesman Repair: £100-220
- Suprima 100 Repair: £100-250
- Suprima 115 Repair: £100-250
- Suprima 30 Repair: £90-180
- Suprima 40 Repair: £100-£350
- Suprima 50 Repair: £100-280
- Suprima 60 Repair: £120-350
- Suprima 70 Repair: £120-350
- Suprima 80 Repair: £100-280
- Titanium Repair: £100-£250
Source
Baxi E55 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