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Verified boiler fault-code guides
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Worcester Bosch · Greenstar 2000 Combi
- Worcester Bosch 2971System pressure too low
- Worcester Bosch 281Pump pressure increase too low
- Worcester Bosch 2941Insufficient flow rate in boiler
- Worcester Bosch 2963Flow and heat exchanger temperature sensor signal outside permissible range
- Worcester Bosch 2964Flow rate in heat exchanger too low
- Worcester Bosch 2965Flow temperature too high
- Worcester Bosch 2966Flow temperature rise in heat exchanger too rapid
- Worcester Bosch 2967Flow/heat exchanger temperature sensor difference too great
- Worcester Bosch 341Temperature rise at boiler too rapid
- Worcester Bosch 342Temperature rise during hot water mode too rapid
- Worcester Bosch 350Short circuit at flow temperature sensor
- Worcester Bosch 351Flow temperature sensor interrupted
- Worcester Bosch 356Power supply for the boiler is too low
- Worcester Bosch 245Internal electronics fault: state out of range.
- Worcester Bosch 249Internal software error in the boiler electronics.
- Worcester Bosch 250Default software error in the boiler electronics.
- Worcester Bosch 251Flash memory test error in the boiler electronics.
- Worcester Bosch 252Stack overflow error in the boiler electronics.
- Worcester Bosch 253RAM test error in the boiler electronics.
- Worcester Bosch 254EEPROM test error in the boiler electronics.
- Worcester Bosch 258Internal watchdog error in the boiler electronics.
- Worcester Bosch 259AD reference error in the boiler electronics.
- Worcester Bosch 262Internal operating-system error in the boiler electronics.
- Worcester Bosch 263Program sequence error in the boiler electronics.
- Worcester Bosch 604System fault in the burner control unit.
- Worcester Bosch 2051Internal fault.
- Worcester Bosch 2908System fault in the boiler electronics / basic controller.
- Worcester Bosch 2914No communication between the appliance controller and the burner module.
- Worcester Bosch 2922Internal fault.
- Worcester Bosch 2928Internal error.
- Worcester Bosch 2931Illegal instruction executed by the microcontroller (internal electronics fault).
- Worcester Bosch 2957Internal burner control error.
- Worcester Bosch 2958System fault in the appliance electronics.
- Worcester Bosch 2973System fault in the boiler electronics / basic controller.
- Worcester Bosch 2974Internal fault.
- Worcester Bosch 246System fault in the boiler electronics / basic controller.
- Worcester Bosch 247System fault in the boiler electronics / basic controller.
- Worcester Bosch 256System fault in the boiler electronics / basic controller.
- Worcester Bosch 257System fault in the boiler electronics / basic controller.
- Worcester Bosch 2909System fault in the boiler electronics / basic controller.
- Worcester Bosch 2930System fault in the boiler electronics / basic controller.
- Worcester Bosch 2932System fault in the boiler electronics / basic controller.
- Worcester Bosch 2959System fault in the appliance electronics.
- Worcester Bosch 2960System fault in the appliance electronics.
- Worcester Bosch 328Brief mains voltage failure
- Worcester Bosch 2940Low voltage
- Worcester Bosch 232Boiler locked by external switching contact
- Worcester Bosch 1021Hot water temperature sensor faulty
- Worcester Bosch 810Hot water remains cold
- Worcester Bosch 2945Too many short heat demands in a short time
- Worcester Bosch 2981Locking fault (boiler locked, contact a qualified heating engineer)
- Worcester Bosch 233Boiler identification module or electronics faulty
- Worcester Bosch 235Conflicting versions of boiler electronics and boiler identification
- Worcester Bosch 237System fault
- Worcester Bosch 242Boiler electronics system fault
- Worcester Bosch 244System fault boiler electronics / basic controller
- Worcester Bosch 227227 indicates that no flame signal was detected after ignition.
- Worcester Bosch 224224 indicates that the safety temperature limiter has tripped.
- Worcester Bosch 1073Short circuit of the flow temperature sensor.
- Worcester Bosch 1074No signal from the flow temperature sensor.
- Worcester Bosch 1075Short circuit of the heat exchanger temperature sensor.
- Worcester Bosch 1076No signal from the heat exchanger temperature sensor.
- Worcester Bosch 1037Outside temperature sensor faulty - heating back-up operation active.
- Worcester Bosch 1068Outside temperature sensor or lambda probe faulty.
- Worcester Bosch 1019Incorrect pump type detected (pump communication failure or wrong pump fitted).
- Worcester Bosch 1018Maintenance interval expired: a service is due.
- Worcester Bosch 1010No BUS communication between the boiler and its display or controls.
- Worcester Bosch 323BUS signal cannot be processed (EMS controls connection).
- Worcester Bosch 360Incomparable code plug: the code plug does not match the boiler.
- Worcester Bosch 362Boiler identification module or boiler electronics faulty (wrong or damaged code plug).
- Worcester Bosch 2946Incorrect code plug detected.
- Worcester Bosch 2085Internal fault.
- Worcester Bosch 2943Mains voltage too low.
- Worcester Bosch 2972Mains voltage too low.
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