Worcester Bosch Boiler Fault Codes

Worcester Bosch fault codes on this site

We document 2,878 fault codes across 110 Worcester Bosch models, covering 936 distinct codes. Worcester Bosch boilers use a mix of numbered codes and light or status indications. Codes for 78 of these models are taken directly from the manufacturer's own service or installation manual.

Models covered: CDi Classic, Greenstar 25Si Compact ErP, GB162, Highflow CDi, Greenstar Ri, Greenstar 8000 Life & Style, 24CDi BF, Greenstar 12Ri ErP, 15 SBi RSF, 24/28CDi II RSF, 24i RSF, 24si II, Greenstar 25CDi, 25Si, Greenstar 27CDi, Greenstar 12i System ErP, Greenstar 30HE, Greenstar Camray Utility, Greenstar CDi Compact, Greenstar Heatslave II, Greenstar Utility 18/25, WR325 RSF, Greenstar 25HE, Greenstar 25i (ZWB 7-25), Greenstar 1000, Greenstar 2000, Greenstar 4000, Greenstar i, Greenstar 24i / 28i Junior, CDi Classic Regular, CDi Highflow, Greenstar System, Greenstar 30i, Highflow 400 CDi, Highflow 550 CDi, Highflow 440 CDi, CDi, Greenstar 28CDi Compact ErP, Greenstar 35 CDi range, Greenstar 42CDi, 26 CDi Xtra, Heatslave, 24 RSF, 28Si, CDi RSF, 35 RSF, 24i / 28i Junior, Danesmoor, Greenstar Utility, Greenstar 30si, Greenstar R29 40 HE, Utility, Greenstar 15i System, R30 HE Plus, 537i, TA 211 E, ZB 7 27 HE, ZWB 7-25, Worcester 25/30 HE, 24/28/35 CDi MkII, 532 / 537 / 542, Greenstar ZWB7, Greenstar i System, 9/14 - 19/24 CBi, Greenstar 30CDi Classic System ErP, 28 Cdi RSF, High Flow 400 BF, 15 CBi, 24 CBi, Greenstar, Greenstar 8000 F, Greenstar 8000+, Greenstar 8000+ Style, Greenstar Highflow, 28i RSF, Greenstar CDi Classic (2012), 24 CDi OF, 24 CDi - L OF, Greenstar 12Ri ErP+, Greenstar R 28 HE System, Greenstar 9i System ErP, Greenstar 15i System ErP, Greenstar 18i System ErP, Greenstar 21i System ErP, Greenstar 24i System ErP, Greenstar 27i System Compact ErP, Greenstar 30i System Compact ErP, 26 CDi Xtra RSF, Greenstar 25 Si, Greenstar 30Si Compact ErP, Highflow 400 OF, Greenstar 25 Si Compact, Greenstar 30 Si Compact, 24 SBi RSF, 240 OF, 533 Compact, 535 Compact, Bosch Greenstar ZWBR 7-25A, Greenstar 24, Greenstar 28, Greenstar 30 CDi Conventional, Greenstar 30 CDi System, Greenstar 40 CDi Conventional, Heatslave 9.24 RSF, Highflow 3.5 RSF, Highflow 4.5 BF, Highflow 4.5 OF, Highflow 400 Electronic BF, Highflow 400 Electronic OF, Highflow 400 Electronic RSF.