Worcester Bosch Boiler Fault Codes
Fault / error code on your Worcester boiler? Enter the code below and find out what the fault means. If you need a fast boiler repair, get in touch with Home Assist 365 today on Bristol: 0117 947 4040.
| Code | Meaning |
|---|---|
| 9A | Boiler has been fitted with incorrect Heat Control Module (HTM). |
| 9U | Faulty or not properly connected code plug. |
| B7 | Control board needs replacing. |
| C6 | System is running too fast or slow. |
| C7 | Fan is not running or the airflow is blocked. |
| D1 | Sensor has become wet, damaged or has disconnected. Boiler will block for 300 seconds. |
| D1 | Boiler is overheating. |
| E2 | Flow sensor has shorted, become damaged or has disconnected. |
| E5 | Primary flow sensor has overheated. |
| E9 | Main heat exchanger has overheated. |
| E9 | Max temperature sensor has failed or can't be recognised. |
| EA | Flue gas thermostat has overheated. |
| EA | Boiler has failed to ignite 4 times. Boiler will wait 30 seconds before another attempt is made. |
| EA | Flame has been extinguished due to moisture in sump, blocked sump or wind in flue. |
| EA | Gas valve coil has disconnected. |
| EA | Flame has not extinguished within 4 seconds of ignition. |
| EA | Pump is not detecting water. |
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