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Error codeE12
Manufacturer error-code record
Source verified

Bosch E12

Bosch defines E12 as limescale buildup in the heat pump.

Documented interpretation

Sourced meaning and scope

User-level

Bosch defines E12 as limescale buildup in the heat pump.

Source scopeBosch US dishwasher support
Applicability boundaryNo model family is assigned. Confirm E12 and the supported descaling procedure in the exact model manual.
Safe next stepFollow Bosch's descaling instructions and the exact model manual. Use dishwasher salt only if the appliance has a supported water-softener system.

Sources: [1]

Shared troubleshooting guide

Continue on the canonical guide

Use caution

Safe dishwasher water-heating checks

This workflow is maintained once to avoid conflicting or duplicated troubleshooting instructions.

Traceability

Sources & references

1 record
Manufacturer support

Bosch dishwasher error codes (opens in a new tab)

Bosch US · Accessed

Last reviewed · Review due

Defines the approved Bosch Batch A signals, meanings, and manufacturer-recommended user checks on the US support site.

Source verified
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