Worcester Bosch Greenstar 30-40 CDi Classic Boiler Error Codes

Worcester Bosch Greenstar 30-40 CDi Boiler Error Codes

Error Code Description
b1 Code plug not detected
C6 Fan speed to low
E9 Safety temp. Limiter in CH flow has tripped.

“Flame not detected.

If it safe to do so, check for:

  • gas is on in the house
  • frozen condensate pipe
  • blocked flue outlet”
F0 Internal error.
f7 Flame detected even though boiler switched off.
FA Flame detected after gas shut off.
Fd Reset button pressed by mistake.

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