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If you have an issue with your Worcester Bosch boiler why not check out the possible causes. We have created a list of fault codes and possible causes below. If you still require help we carry out boiler repairs and breakdowns in the poole and Bournemouth Area .

For Boiler Breakdowns in Bournemouth Call 01202 481000

For Boiler Breakdowns in Poole Call 01202 668822

or Book online

9A Boiler has been fitted with incorrect Heat Control Module (HTM).

9U The code plug could be faulty or not properly connected.

B7 You need to replace the control board

C6 The system is running too fast or too slow.

C7 Fan is not running or the airflow could be blocked.

D1 Sensor could be wet, damaged or disconnected. The boiler will block for 300 seconds. Or could be overheating

E2 The Flow sensor has shorted, is damaged or disconnected.

E5 The primary flow sensor has overheated.

E9 The main heat exchanger has overheated as the main temperature is 150 degrees, Maximum temperature sensor on the main heat exchanger cannot be recognised or has failed,The flue gas thermostat has overheated

EA Failure after four ignition attempts. The boiler will wait 30 seconds before another attempt is made,A flame has been extinguished due to either moisture in the sump, a blocked sump or strong wind in the flue,Gas valve coil has been disconnected,Flame has not extinguished within first 4 seconds of ignition,There is an error as the pump is not detecting water. Check the pressure gauge and re-pressurise to 1 bar

A1 Little or no water in the system- Check pressure gauge and re-pressurise to 1 bar.

C1  Fan has stopped.

EA No flame is detected and so the boiler will block during 4 attempts before going to Locking fault

EF The boiler is operating at minimum burner load and there is higher flow temperature of 18 degrees.

260  Sensor has been disconnected or there is no water content- check pressure gauge and repressurise to 1 bar.

We also have some self help videos