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Error code reference
Bosch Washer Error Code Er:21
Spinning aborted due to unbalanced load-unbalanced load or faulty wire harness.
SourceBosch Nexxt Washer - Training Manual: Disassembly & Repairp. 20
Diagnostic procedure
The full Er:21 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 drain pump, wire harness, and drain hose.
SourceBosch WFMC/WFXD Washer - Service Manual: Test Program Guidep. 69
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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Where this code is documented
3 manuals in the MyPros+ library document this code for Bosch washer.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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