Error code reference

Bosch Dishwasher Error Code E:21

Sanitized LED flashes; caused by faulty heat pump wire harness or faulty heat pump motor winding.

SourceBosch Dishwasher - Tech Sheet: Fault Codes & Service Programs (SHX68T55UC02)Page 3 of 5

Diagnostic procedure

The full E: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

First diagnostic step

Check continuity between heat pump and power module. Measure heat pump motor winding resistance between any 2 terminals (should be ≈ 15.2 Ω @ room temp). If so, replace power module. If not, replace heat pump.

SourceBosch Dishwasher - Tech Sheet: Fault Codes & Service Programs (SHX68T55UC02)Page 3 of 5

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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

27 manuals in the MyPros+ library document this code for Bosch dishwasher.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full E:21 procedure

Where this code is documented

Models covered by the manuals that document this code

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