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Worcester Bosch Boiler Fault Codes
Browse the available Worcester Bosch boiler fault codes in one place, then open the exact code page for the likely meaning, safe first steps, and when to stop troubleshooting.
Browse the parent brand page: Worcester Bosch
Most common faults to check first
Common problems in this cluster
circulation problems
Start with A1, then compare 2 related code pages in this cluster.
flame-loss problems
Start with 232, then compare 2 related code pages in this cluster.
sensor problems
Start with 208, then compare 2 related code pages in this cluster.
fan and flue problems
Start with C6, then compare 1 related code pages in this cluster.
low-pressure problems
Start with 224, then compare 1 related code pages in this cluster.
overheat problems
Start with 229, then compare 1 related code pages in this cluster.
Common fault categories
circulation
3 related codes
flame-loss
3 related codes
sensor
3 related codes
fan and flue
2 related codes
low-pressure
2 related codes
overheat
2 related codes
Most searched / most useful codes
EA meaning and fix
The boiler failed to establish a flame
A1 meaning and fix
The boiler is detecting poor water circulation
229 meaning and fix
The boiler has overheated or hit a high temperature limit
232 meaning and fix
Flame detection has been lost during operation
233 meaning and fix
Flame detection has been lost during operation
268 meaning and fix
Water circulation or pump performance issue
All fault codes in this cluster
18 code pages currently available for this brand and appliance cluster.
| Code | Meaning | Severity |
|---|---|---|
| 208 | A boiler sensor is giving an invalid reading | medium |
| 224 | System water pressure is too low | medium |
| 227 | System water pressure is too low | medium |
| 229 | The boiler has overheated or hit a high temperature limit | high |
| 232 | Flame detection has been lost during operation | high |
| 233 | Flame detection has been lost during operation | high |
| 268 | Water circulation or pump performance issue | high |
| 281 | A boiler sensor is giving an invalid reading | medium |
| 286 | Water circulation or pump performance issue | high |
| 295 | A boiler sensor is giving an invalid reading | medium |
| 296 | Flame detection has been lost during operation | high |
| 297 | Gas supply control or gas valve issue | high |
| A1 | The boiler is detecting poor water circulation | high |
| C6 | Fan, flue, or air pressure sensing problem | high |
| CE | Fan, flue, or air pressure sensing problem | high |
| D1 | Control board or internal communication fault | high |
| E9 | The boiler has overheated or hit a high temperature limit | high |
| EA | The boiler failed to establish a flame | high |