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E520Miele Washer

Miele Washer Error E520 – Meaning, Causes & How to Fix

The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range.

Medium Severity
Low
Medium
High
Critical

Expert Verified

Reviewed by a Certified Electrical Engineer & Licensed Technician

Official Meaning

The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range.

Real-World Causes

  • 1Electronic control board failure
  • 2Sensor damaged by moisture or mineral buildup
  • 3Faulty valve solenoid
  • 4Low water pressure in plumbing system
  • 5Kinked or bent hoses restricting water flow

Symptoms

Look for these signs to confirm error E520 on your Miele Washer:

  • Machine pauses and displays error
  • Appliance stops mid-cycle
  • Error appears at start of cycle
  • Clicking sounds as relays activate

DIY Fix (Safe)

  1. 1Verify household water and power supply
  2. 2Inspect hoses and filters for blockages
  3. 3Restart appliance after disconnecting power for 5 minutes
  4. 4Clean accessible filters and sensors
  5. 5Run diagnostic mode if available

Professional Action Required

  1. 1Test valves, sensors, and motors with multimeter
  2. 2Inspect wiring harness and connectors
  3. 3Replace defective pumps, motors, or sensors
  4. 4Check control board relays
  5. 5Replace electronic control board if failure confirmed

Additional Context

Load Type
Any load type
Drain Related
Depends on cycle stage
Sensor Issues
Incorrect readings possible if sensors are blocked

Frequently Asked Questions

What does Miele Washer error E520 mean?
The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range.
What causes Miele Washer E520 error?
Common causes include: Electronic control board failure, Sensor damaged by moisture or mineral buildup, Faulty valve solenoid.
How do you fix Miele Washer error E520?
Start with these DIY steps: Verify household water and power supply. Inspect hoses and filters for blockages. If the error persists, professional service may be needed.

Related Error Codes

Other Miele Washer Errors

E346The appliance control system detected a condition indicating drain system failure – water cannot be removed properly
E84The appliance control system detected a condition indicating motor control error – the controller cannot communicate with drive motor
E187The appliance control system detected a condition indicating drain system failure – water cannot be removed properly
E409The appliance control system detected a condition indicating fan motor failure – cooling or ventilation fan not operating
E115The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range
E550The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range
E104The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range
E392The appliance control system detected a condition indicating temperature sensor fault – thermistor readings are outside expected range

About the Author

Technical Review Team

Reviewed by certified technicians with 10+ years of Miele repair experience. Every error code is verified against manufacturer service manuals and real-world repair data.