Low
2L on Buderus 600-28C

Your boiler is performing a routine check of its internal pump to ensure everything is working correctly before it starts up.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Appears in the display after waiting approximately 4 minutes during pump check to indicate pump operation status/test

From this model's manual
Verified against the Buderus 600 28c installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Wait at least 4 to 5 minutes for the automated test to finishDo nothing while the code is displayed as the boiler is simply self-diagnosingCheck if the code disappears and the boiler returns to normal operation automatically

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