Shown below are Worcester Bosch Fault Codes. Please note some faults may be applicable only to certain models or types of boiler.
|A1||Link||Pump has run dry or pump has stalled/seized.||Check for water leaks. |
Free the pump or replace.
|A7||Link||Hot water NTC sensor defective.||Check hot water NTC sensor and connecting lead for circuit breaks/short circuits.|
|A8||Link||Break in communication to TD200 or/and RT10.||Check electrical connections.|
|b1||Link||Code plug not detected.||Insert code plug correctly, test and replace if necessary.|
|C6||Link||Fan speed too low.||Check fan lead and connector, and fan; replace as necessary.|
|E2||Link||CH flow NTC sensor defective.||Check CH flow NTC sensor and connecting lead.|
|E9||Link||Safety temp. limiter in CH flow has tripped.||Check system pressure, check safety temp. limiters, check pump operation, check fuse on pcb, bleed appli- ance.|
|EA||Link||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 C02 level.|
|F0||Link||Internal error.||Check electrical connector contacts, programmer inter- face module ignition leads are not loose; replace pcb if necessary.|
|F7||Link||Flame detected even though appliance switched off.||Check electrode assembly, dry pcb. Flue clear?|
|FA||Link||Flame detected after gas shut off.||Check gas valve and wiring to gas valve. Clean conden- sation trap and check electrode assembly. Flue clear?|
|Fd||Link||Reset button pressed by mistake.||Press reset button again.|
|-¦¦- and XX||Link||Siphon fill mode||Wait approx 15 mins|