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Worcester Bosch CDi Classic Regular Boiler

Including: All Variants

Find Your Error Code

Error Code: B1


Cause: Code plug not detected . Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: C6


Cause: Fan speed too low – the fan lead and connector need checking and may need replacing. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: E2


Cause: Central heating (CH) water flow negative thermistor coefficient (NTC) sensor defective check CH flow NTC sensor and connection leads. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: E9


Cause: Safety temperature limiter in central heating (CH) flow has tripped the system pressure or safety temperature limiter needs checking Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: EA


Cause: Flame not detected due to a gas issue – the gas supply, power supply or igniter, electrode and lead need checking – contact a Gas Safe installer. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: F0


Cause: Internal error – electrical connector contacts or programmer interface module – check ignition leads are not loose. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: F7


Cause: Flame detected even though the appliance is switched off – check the electrode assembly is dry and the pcb and flue are clear. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: FA


Cause: Flame detected after gas shut off – the gas valve needs checking – hire a Gas Safe installer. Difficulty: 1 2 3 4 5 Engineer: Required Solutions To Try: Visibly look for the spark




Error Code: FD


Cause: Reset button pressed by mistake. Difficulty: 1 2 3 4 5 Engineer: No Solutions To Try: Press reset button again.





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