BoilerFaultCodesBaxi 432 Fault Code
The Baxi 432 fault code means: your boiler has detected an issue with its electrical grounding system, which is a safety feature that prevents electrical faults.. It appears on 26 Baxi models in our database.
Technical description: Earth connector error
What causes the Baxi 432 fault?
This fault occurs when the boiler's internal computer loses its physical connection to the electrical earth, which is a vital safety link. The most common reason is a loose or corroded wire within the boiler's internal harness, or a component failure on the main circuit board that prevents it from verifying the circuit is safe.
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 432 fault code
Click a model for the full fault code list and model-specific repair notes.
- 400 Combi (range) Repair: £100-250
- 800 Repair: £90-250
- 80e Repair: £90-180
- Assure Repair: £90-180
- Bermuda Repair: £90-180
- Eco Compact Repair: £100-250
- Eco Elite Repair: £100-250
- EcoBlue Repair: £90-250
- EcoBlue Advance Repair: £90-250
- EcoBlue Advance Heat Repair: £90-250
- EcoBlue Heat Repair: £90-250
- EP Repair: £90-220
- Netaheat Repair: £90-220
- Performa Repair: £100-220
- Profile Repair: £90-180
- Profile Prima Repair: £90-250
- Statesman Repair: £90-180
- Suprima 100 Repair: £90-250
- Suprima 115 Repair: £100-280
- Suprima 30 Repair: £90-180
- Suprima 40 Repair: £90-250
- Suprima 50 Repair: £90-180
- Suprima 60 Repair: £90-180
- Suprima 70 Repair: £120-350
- Suprima 80 Repair: £90-180
- Titanium Repair: £90-250
Source
Baxi 432 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