Buderus Boiler Fault Codes

16 fault codes across 1 Buderus boiler models — explained in plain English.

Buderus (Bosch Group) domestic condensing boilers.

16 fault codes
1 models documented
0 currently sold
1 legacy models
Just want the most common Buderus problems?
The top 8 faults across the whole Buderus range — causes, DIY checks, repair costs.
Most serious

High-severity Buderus fault codes

8Y
Your boiler has paused because a safety switch related to your underfloor heating has detected a problem or has been disconnected.
600-28C
 2E
Your boiler has stopped working because the water pressure is too low for it to operate safely.
600-28C
 3A
Your boiler has stopped working because the main control board is unable to talk to or control the fan.
600-28C
 3P
Your boiler has stopped working because the fan that clears exhaust gases is not spinning at the correct speed to keep the system safe.
600-28C
 3Y
Your boiler has detected that the internal fan is spinning at the wrong speed, which prevents the unit from safely starting the combustion process.
600-28C
All models

1 Buderus boiler models

600-28C
Combi Discontinued
16 fault codes · 2003 onwards
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