BoilerFaultCodesBaxi E3 Fault Code
The Baxi E3 fault code means: your boiler's electronic control centre has developed an internal fault and is unable to communicate with the rest of the system.. It appears on 23 Baxi models in our database.
Technical description: Printed circuit board (PCB) fault
What causes the Baxi E3 fault?
This fault occurs when the boiler's internal computer brain suffers a hardware failure or a breakdown in its electronic circuitry. The most common reason is age-related wear to the electrical components on the board, though it can also be triggered by a sudden power surge or moisture getting into the control box.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Baxi models that show the E3 fault code
Click a model for the full fault code list and model-specific repair notes.
- 400 Combi (range) Repair: £280-450
- 800 Repair: £350-£550
- 80e Repair: £280-£450
- Assure Repair: £280-450
- Avanta Repair: £250-£450
- Bermuda Repair: £280-500
- Eco Compact Repair: £250-£450
- Eco Elite Repair: £250-450
- EP Repair: £280-£450
- Netaheat Repair: £280-450
- Performa Repair: £280-450
- Profile Repair: £280-450
- Profile Prima Repair: £240-£450
- Statesman Repair: £350-£550
- Suprima 100 Repair: £280-£450
- Suprima 115 Repair: £280-450
- Suprima 30 Repair: £280-450
- Suprima 40 Repair: £280-450
- Suprima 50 Repair: £240-380
- Suprima 60 Repair: £280-£450
- Suprima 70 Repair: £280-£450
- Suprima 80 Repair: £240-£450
- Titanium Repair: £250-£450
Source
Baxi E3 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