Worcester Greenstar 40 CDI Classic Regular ErP Boiler Fault Codes

Code	Description	Remedy
b1	Code plug not detected	Insert code plug correctly, test and replace if necessary
C6	Fan speed too low.	Check fan lead and connector, and fan; replace as necessary.
E2	CH flow NTC sensor defective.	Check CH flow NTC sensor and connecting lead.
E9	Safety temperature limiter in CH flow has tripped.	Check system pressure, check safety temp. limiters, check pump operation, check fuse on pcb, bleed appliance.
EA	Flame not detected.	Is gas cock turned on? Check gas supply pressure, power supply, igniter electrode and lead, ionisation sensing electrode and lead, flue duct and CO2 level.
F0	Internal error.	Check electrical connector contacts, programmer inter-face module ignition leads are not loose; replace pcb if necessary.
F7	Flame detected even though appliance switched off.	Check electrode assembly, dry pcb. Flue clear?
FA	Flame detected after gas shut off.	Check gas valve and wiring to gas valve. Clean condensation trap and check electrode assembly. Flue clear?
Fd	Reset button pressed by mistake	Press reset button again