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Error code reference
Gaggenau Oven Error Code E129
Water sensor short-circuit-water sensor is not attached; valves are switched off via the float switch.
SourceGaggenau Steam Oven - Service Manual: BS27X & BS28Xp. 58
Diagnostic procedure
The full E129 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check for a short on the 5V line. Examine the lines and implement a double mains reset.
SourceGaggenau Steam Oven - Service Manual: BS27X & BS28Xp. 58
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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