Worcester Boiler Error Codes
Listed below is a list of the most common fault codes most Worcester / Worcester Bosch Greenstar Boilers.
The alpha numeric code on your boiler indicates the one of the following faults
Error Code | Probable cause |
---|---|
EA | A Failure of 4 ignition attempts has occured. The boiler then suspends for 30 seconds before a further attempts are made. |
EA | The pilot light has been extinguished.
This could be caused by;
|
EA | Gas valve coil has broken or disconnected |
EA | The Pilot light has not established during the first 4 seconds ignition period |
EA | There is a problem where the pump is not detecting water – Check the pressure gauge and re pressurise to the green area or 1 bar. |
9A | The Wrong HCM unit has been fitted |
9U | Problem with the code plug. The plug might be faulty or |
B7 | Replace control board |
C6 | The fan is either;
|
C7 | Fan not running / Fan not running or airflow blocked |
D1 | Sensor wet or damaged (the boiler will block for 300 seconds before this condition) |
D1 | Sensor disconnected or damaged (the boiler will block for 300 seconds before this condition) |
D1 | Boiler overheating problem |
E2 | Flow sensor had been shorted or damaged |
E2 | Flow sensor dysfunctional or damaged |
E5 | The Primary flow sensor has overheated |
E9 | The heat exchanger has overheated. This temperature usually exceeds 105°C |
E9 | Maximum temperature sensor on the primary heat exchanger has stopped functioning |
E9 | If the heat exchanger is new, the fault may be that the heat exchanger has not been recognised |
E9 | The flue gas thermostat has overheated |
Model | Type | Dimensions | Maximum Flow Rate | Output | Efficiency Rating | Typical Price |
---|---|---|---|---|---|---|
Greenstar 12Ri | Regular | H – 600 mm
W – 390 mm D – 270 mm |
N/A | 12 kW | A 90% and above | £759.15 |
Greenstar 24i Junior | Combi | H – 710 mm
W – 400 mm D – 330 mm |
9.8 l/min | 24 kW | A 90% and above | £767.39 |
Greenstar 15Ri | Regular | H – 600 mm
W – 390 mm D – 270 mm |
N/A | 15 kW | A 90% and above | £777.65 |
Greenstar 12i System | System | H – 710 mm
W – 400 mm D – 330 mm |
N/A | 12 kW | A 90% and above | £824.13 |
Greenstar 18Ri | Regular | H – 600 mm
W – 390 mm D – 270 mm |
N/A | 18 kW | A 90% and above | £838.47 |
Greenstar 25Si | Combi | H – 710 mm
W – 400 mm D – 330 mm |
10.2 l/min | 25 kW | A 90% and above | £851.9 |
Greenstar 15i System | System | H – 710 mm
W – 400 mm D – 330 mm |
N/A | 15 kW | A 90% and above | £853.78 |
Greenstar 28i Junior | Combi | H – 710 mm
W – 400 mm D – 330 mm |
11.4 l/min | 28 kW | A 90% and above | £854.88 |
Greenstar 24Ri | Regular | H – 600 mm
W – 390 mm D – 270 mm |
N/A | 24 kW | A 90% and above | £877.49 |
Greenstar 18i System | System | H – 710 mm
W – 400 mm D – 330 mm |
N/A | 18 kW | A 90% and above | £888.72 |
Greenstar 24i System | System | H – 710 mm
W – 400 mm D – 330 mm |
N/A | 24 kW | A 90% and above | £930.08 |
Greenstar 30Si | Combi | H – 710 mm
W – 400 mm D – 330 mm |
12.3 l/min | 30 kW | A 90% and above | £952.64 |
Greenstar 28CDi Compact | Combi | H – 680 mm
W – 390 mm D – 280 mm |
11.4 l/min | 28 kW | A 90% and above | £973.44 |
Greenstar 29CDi Classic | Combi | H – 760 mm
W – 440 mm D – 360 mm |
12.3 l/min | 29 kW | A 90% and above | £1018.8 |
Greenstar 30CDi Classic Regular | Regular | H – 760 mm
W – 440 mm D – 360 mm |
14.3 l/min | 34 kW | A 90% and above | £1062.46 |
Greenstar 30CDi Classic System | System | H – 760 mm
W – 440 mm D – 360 mm |
14.3 l/min | 30 kW | A 90% and above | £1062.46 |
Greenstar 34CDi Classic | Combi | H – 760 mm
W – 440 mm D – 360 mm |
14.3 l/min | 34 kW | A 90% and above | £1062.46 |
Greenstar 32CDi Compact | Combi | H – 680 mm
W – 390 mm D – 280 mm |
13.1 l/min | 32 kW | A 90% and above | £1085.76 |
Greenstar 36CDi Compact | Combi | H – 680 mm
W – 390 mm D – 280 mm |
14.7 l/min | 36 kW | A 90% and above | £1204.32 |
Greenstar 38CDi Classic | Combi | H – 760 mm
W – 440 mm D – 360 mm |
16.4 l/min | 38 kW | A 90% and above | £1274.21 |
Greenstar 40CDi Classic Regular | Regular | H – 760 mm
W – 440 mm D – 360 mm |
N/A | 40 kW | A 90% and above | £1363.85 |
Greenstar FS 30CDi Regular | Regular | H – 850 mm
W – 400 mm D – 600 mm |
N/A | 30 kW | A 90% and above | £1398.39 |
Greenstar 42CDi Classic | Combi | H – 760 mm
W – 440 mm D – 360 mm |
17.1 l/min | 42 kW | A 90% and above | £1435.01 |
Greenstar Highflow 440CDi | Combi | H – 850 mm
W – 600 mm D – 600 mm |
20 l/min | 29 kW | A 90% and above | £1710.16 |
Greenstar FS 42CDi Regular | Regular | H – 850 mm
W – 400 mm D – 600 mm |
N/A | 42 kW | A 90% and above | £1847.1 |
Greenstar Highflow 550CDi | Combi | H – 850 mm
W – 600 mm D – 600 mm |
14.3 l/min | 30 kW | A 90% and above | £2033.58 |