Bosch Washer - Er:12 Error Code

The washer detected a water inlet fault.

Meaning

The washer detected a water inlet fault.

The Bosch Er:12 error code indicates that the washer is not filling with water at the expected rate. Older Bosch washers monitor water level via a pressure switch; if the level does not rise within a defined time window, Er:12 is triggered. This is typically caused by clogged inlet screens, low water pressure, or a faulty inlet valve.

Symptoms

  • Washer takes too long to fill
  • No water entering the drum
  • Er:12 appears shortly after cycle start

Causes

  • Clogged inlet filters
  • Kinked or frozen hoses
  • Low household water pressure
  • Faulty inlet valve
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Step-by-Step Fixes

  • Clean the inlet screens on both hoses.
  • Ensure both water valves are fully open.
  • Straighten any kinks in the hoses.
  • Test the inlet valve for proper operation.
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Safety Notes

  • Turn off water supply before removing hoses.
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Applicable Models

Show Models
  • WFL2060
  • WFR2460
  • WFMC2100
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Related Pages

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Other Bosch Washer Error Codes

Show All Error Codes

Model-Specific Notes

On WFR models, Er:12 often appears during winter months due to partially frozen inlet hoses.

Disclaimer

The information provided on this page is for educational and informational purposes only. Repairs involve electrical, mechanical, and water-related risks. Always follow manufacturer instructions and consider contacting a qualified technician for diagnosis or repair.

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