BoilerFaultCodesWorcester Bosch Boiler Fault Codes
929 fault codes across 78 Worcester Bosch boiler models.
Market-leading UK boiler brand, part of the Bosch Group. Known for reliability and long warranties.
Most searched Worcester Bosch fault codes
A1 A7 A8 B1 C6
Your boiler has detected that there is not enough water circulating through the system, which could be due to a leak or a mechanical issue with the pump.
CDi Classic
Your boiler's hot water sensor has failed or has a broken connection, meaning you likely won't have any hot water.
CDi Classic
Your boiler has lost its connection to the external heating controls, meaning it cannot receive instructions on when to turn on or off.
CDi Classic
Your boiler's computer memory chip is loose or missing, meaning the system doesn't know which model it is and has stopped working for safety.
CDi Classic
Your boiler has stopped working because the internal fan, which safely removes waste gases, is not spinning fast enough.
CDi Classic
CDi Classic
Combi Discontinued
12 fault codes
· 2012-2019
Greenstar Si Combi / i System
CombiSystem Discontinued
28 fault codes
· 2013-2022
CDi Classic
Regular Discontinued
50 fault codes
· 2012-2019
GB162
SystemRegular Discontinued
67 fault codes
· 2008-2022
Highflow CDi
Combi Discontinued
2 fault codes
· 2007-2019
Greenstar Ri
Regular
18 fault codes
· 2005-present
Greenstar 8000 Life/Style
CombiSystemRegular
163 fault codes
· 2019-present
24CDi BF
Combi Discontinued
5 fault codes
· 1997-2005
Greenstar 12Ri
Regular Discontinued
8 fault codes
· 2005-2016
14/19cbi
Regular Discontinued
5 fault codes
· 1994-2002
Greenstar 15sbi
Regular Discontinued
0 fault codes
· 2005-2013
24/28CDi II RSF
Combi Discontinued
29 fault codes
· 2003-2007
Greenstar 24i Junior
Combi Discontinued
16 fault codes
· 2005-2013
24i RSF
Combi Discontinued
2 fault codes
· 1994-2001
24si II
Combi Discontinued
10 fault codes
· 2002-2005
25/28si
Combi Discontinued
3 fault codes
· 2001-2005
Greenstar 25CDi
Combi Discontinued
0 fault codes
· 2005-2015
25si and 28si
Combi Discontinued
18 fault codes
· 2001-2005
Greenstar 25Si
Combi Discontinued
20 fault codes
· 2005-2013
26cdi Xtra
Combi Discontinued
0 fault codes
· 2002-2005
Greenstar 27CDi
Combi Discontinued
0 fault codes
· 2005-2015
29 HE Conventional
Regular Discontinued
31 fault codes
· 2003-2007
Greenstar 12i System
System Discontinued
31 fault codes
· 2005-2015
Greenstar 24i Junior
Combi Discontinued
6 fault codes
· 2005-2013
Greenstar 25 HE Combi
Combi Discontinued
21 fault codes
· 2005-2007
Greenstar 30HE
Combi Discontinued
20 fault codes
· 2003-2007
Greenstar Camray Utility
RegularOil
0 fault codes
· 2008-present
Greenstar CDi Compact
Combi
132 fault codes
· 2012-present
Greenstar HE 12/22
RegularOil Discontinued
2 fault codes
· 2004-2012
Greenstar Heatslave II
OilCombi
6 fault codes
· 2015-present
Highflow 400 BF
Combi Discontinued
40 fault codes
· 1994-2003
R30 35 And 40 HE Plus
System Discontinued
25 fault codes
· 2003-2007
RD 532 Combi
Combi Discontinued
21 fault codes
· 2005-2007
RD 532i RD
Combi Discontinued
19 fault codes
· 1994-2003
TA 211 E
Regular Discontinued
2 fault codes
· 1994-1998
Greenstar Utility 18/25
RegularOil Discontinued
12 fault codes
· 2007-2022
WR325 RSF
Combi Discontinued
41 fault codes
· 1994-2000
ZB 7 27 HE
System Discontinued
20 fault codes
· 2002-2005
Greenstar 25HE
Combi Discontinued
27 fault codes
· 2003-2005
Greenstar 25i (ZWB 7-25)
Combi Discontinued
17 fault codes
· 2005-2015
Greenstar 1000
0 fault codes
Greenstar 2000
0 fault codes
Greenstar 4000
0 fault codes
Greenstar 8000
0 fault codes
Greenstar 8000+ Style
0 fault codes
Greenstar 8000 Life
0 fault codes
Greenstar i
0 fault codes
Greenstar Si
0 fault codes
Greenstar i Junior
0 fault codes
Greenstar CDi Classic
0 fault codes
Greenstar CDi Classic Regular
0 fault codes
Greenstar CDi Highflow
0 fault codes
Greenstar System
0 fault codes
Greenstar 28i Junior
0 fault codes
Greenstar 30i Junior
0 fault codes
Highflow 400 CDi
0 fault codes
Highflow 550 CDi
0 fault codes
Highflow 440 CDi
0 fault codes
CDi 24
0 fault codes
CDi 28
0 fault codes
CDi 35
0 fault codes
CDi 42
0 fault codes
26 CDi Xtra
0 fault codes
Heatslave
0 fault codes
Greenstar Heatslave
0 fault codes
24 RSF
0 fault codes
28 RSF
0 fault codes
30 CDi RSF
0 fault codes
Combi 24 RSF
0 fault codes
Combi 28 RSF
0 fault codes
Combi 35 RSF
0 fault codes
28i RSF
0 fault codes
Junior 24i
0 fault codes
Junior 28i
0 fault codes
Hideaway
0 fault codes
Danesmoor
0 fault codes
Highflow 250
0 fault codes
Highflow 300
0 fault codes
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