Krupps error codes, decoded.
Look up any Krupps fault code below. Each one is grounded in Krupps's own service documentation — the meaning, the symptoms, the causes, and the steps to clear it.
Co-founder & CEO · Reviewed June 2026
Krupps sits in our Commercial Kitchen coverage. Every page here is transcribed from the manufacturer's manuals, not scraped from forums.
What error codes does Krupps display?
Tap a code for the full breakdown — meaning, symptoms, causes, and fix steps.
Both boiler and tank temperature probes faulty; heating disabled
AL-04Tank loading timeout; the tank did not fill within the maximum time
AL-05Drain timeout; the tank pressure switch did not open at the end of the drain cycle
AL-06Heating timeout; the water did not heat within the maximum time
SALExhausted brine; refill softener salt for the built-in softener
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