• Worcester Bosch Boiler Error Codes

Listed below are Worcester boiler fault codes and Worcester boiler Manuals.

Fault Description
Boiler Behaviour
Locking error The boiler display will flash a warning triangle and fault code. At the same time a (static) cause code will also be displayed. Manual intervention (Pressing the reset button on the boiler fascia) is required following clearance of the fault.
Blocking error The boiler will stop operating with no fault data displayed. The cause code, in the info menu, is accessed by pressing the spanner/return button. The condition will clear automatically when the associated fault clears e.g. waiting for an area to cool. In some cases a blocking error has a defined time duration prior to changing to a locking condition.
Fault error Alpha numeric code indicating the fault group
Cause error Three digit number. During a blocking error (or normal operating status) it is not displayed, but accessed in the info menu via the spanner/return button. During a locking error the cause code flashes on the display.
Maintenance codes These are displayed with the letter H followed by a number. The code advises of a situation that will need some attention but is not a fault that will stop the boiler from functioning. Some of the common ones are listed:
H11
Hot water outlet sensor defect, hot water can still be delivered but with less control
H13
A time has been set in the Service interval function i.e. 1 to 72 months and that time has expired. Menu 2.5F allows this feature to be set (1 to 72), a 0 will disable this function.

  • To get your Worcester Boiler Repaired, call us today on Cardiff 02920 140240

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Fault Description
Boiler Behaviour
9A Incorrect HCM fitted
9U Problem with the code plug (faulty or not connected)
B7 Replace control board
C6 Running too fast / Running too slow
C7 Fan not running / Fan not running or airflow blocked
D1 Sensor wet or damaged (the boiler will block for 300 seconds before this condition)
D1 Sensor disconnected or damaged (the boiler will block for 300 seconds before this condition)
D1 Boiler overheat
E2 Flow sensor shorted or damaged
E2 Flow sensor disconnected or damaged
E5 Primary flow sensor overheated
E9 The main heat exchanger has overheated.
Maximum temperature 105°C
E9 Maximum temperature sensor on the main heat exchanger has failed
E9 Maximum temperature sensor on the main heat exchanger has not been recognised
E9 Flue gas thermostat overheat
EA Failure of four ignition attempts. The boiler waits 30 seconds before another attempt is made
EA An established flame has been extinguished.
This could be caused by:
moisture in the sump, due to a blocked sump/condensate trap.
a strong wind into the flue
EA Gas valve coil disconnected
EA Flame not established during the first 4 seconds ignition period
EA There is an error where the pump is not detecting water – check pressure gauge and repressurise to 1 bar.

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Fault Description
Boiler Behaviour
A1 Little or no water in the system – check pressure gauge and repressurise to 1 bar.
C1 Fan has stopped
EA No flame is detected. The boiler will block during 4 attempts before going to Locking fault
EF The boiler is operating at minimum burner load and there is a greater than 18°C Flow & Return temperature difference
No Code Air lock or reduced water content – check pressure gauge and repressurise to 1 bar
260 Sensor disconnected or no water content – check pressure gauge and repressurise to 1 bar

  • To get your Worcester Boiler Repaired, call us today on Cardiff 02920 140240

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Greenstar

 WORCESTER Greenstar RI manufactured aug 08 jan 11

 WORCESTER Greenstar SI manufactured aug 08 july 09 1

 WORCESTER Greenstar I system manufactured from feb 2011 1

 WORCESTER Greenstar I_ERP

 WORCESTER Greenstar RI manufactured aug 08 jan 11 1

 WORCESTER Greenstar I system manufactured april 2005 july 2008 1

 WORCESTER Greenstar I junior manufactured aug 08 july 09 1

 WORCESTER Greenstar CDi service booklet for engineers

 WORCESTER Greenstar Highflow CDi 1

 WORCESTER Greenstar Heatslave

 WORCESTER Greenstar CDi conventional 1.pdf

 WORCESTER Greenstar Highflow CDi

 WORCESTER Greenstar CDi part 1 of 2

 WORCESTER Greenstar CDi part 2 of 2

 WORCESTER Greenstar CDi system

 WORCESTER Greenstar FS cdi regular

 WORCESTER Greenstar CDi Compact Combi ErP Installation and Servicing Instructions

 WORCESTER Greenstar CDi Classic Regular ErP Installation and Servicing Instructions

 WORCESTER Greenstar CDi Classic System ErP Installation and Servicing Instructions

 WORCESTER Greenstar CDi Classic Combi ErP Installation and Servicing Instructions

 WORCESTER Greenstar 27 30 I System ErP Installation and Servicing Instructions

 WORCESTER Greenstar 27 30 Ri Compact ErP Installation and Servicing Instructions

 WORCESTER Greenstar 440 and 500 CDi Highflow Combi ErP Installation and Servicing Instructions

 WORCESTER Greenstar 24I 24I JNR

 WORCESTER Greenstar 12 24 Ri ErP Installation and Servicing Instructions

 WORCESTER Greenstar 25 30 Si Compact ErP Installation and Servicing Instructions

 WORCESTER Greenstar 24 30 Combi Installation and Servicing Instructions

 WORCESTER Greenstar 12 24 i System ErP Installation Servicing Instructions

 WORCESTER Greenstar I Combi ErP Installation and Servicing Instructions

 WORCESTER Greenstar 25 40 CDi Combi Operating Instructions

 WORCESTER 24i junior rsf discontinued aug 07

CDI Series

 WORCESTER 24 CDi OF Installation and Servicing Instructions

 WORCESTER 24 28 35MKII CDi Installation and Servicing Instructions

 WORCESTER 24 CDi OF Installation and Servicing Instructions

 WORCESTER 24 28 35MKII CDi Installation and Servicing Instructions 2

SI

 WORCESTER si ii discontinued june 07

 WORCESTER si discontinued march 02

 WORCESTER si discontinued march 02

 WORCESTER si ii discontinued june 07

I Series

WORCESTER 24i discontinued nov 04

WORCESTER Highflow 440 Combi Operating Instructions 2

WORCESTER spare parts list for 28i junior rsf

WORCESTER 28i discontinued nov 05

WORCESTER 24i junior rsf discontinued aug 07

WORCESTER 24i discontinued nov 04

WORCESTER 28i discontinued nov 05

240 – 350

WORCESTER 240 of discontinued dec 1997

WORCESTER 280 rsf discontinued feb 1997

WORCESTER 230 discontinued dec 1997

WORCESTER 240 bf discontinued dec 1997

WORCESTER 350 rsf discontinued july 1998

WORCESTER 240 rsf discontinued dec 1997

WORCESTER 350 rsf discontinued july 1998

WORCESTER 230 discontinued dec 1997

WORCESTER 240 rsf discontinued dec 1997

WORCESTER 240 of discontinued dec 1997

WORCESTER 280 rsf discontinued feb 1997

WORCESTER 240 bf discontinued dec 1997

High flow

WORCESTER highflow 400 rsf manufactured after 1997

WORCESTER Highflow 440 Combi Operating Instructions

WORCESTER highflow 400 rsf manufactured after 1997

Spare Part lists

 WORCESTER spare parts list for 24si ii rsf

WORCESTER spare parts list for 230 rsf

WORCESTER spare parts list for highflow 400 of

WORCESTER spare parts list for 350 rsf

WORCESTER spare parts list for 240 rsf

WORCESTER spare parts list for 25si rsf

WORCESTER spare parts list for 28i rsf

WORCESTER spare parts list for highflow 400 bf

WORCESTER spare parts list for highflow 400 rsf

WORCESTER spare parts list for 240 bf

WORCESTER spare parts list for 280 rsf

WORCESTER spare parts list for 24i junior rsf

WORCESTER spare parts list for 240 of

  • Call for a Boiler repair today on Cardiff 02920 140240

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