Refrigerator Medium Severity
F1 Miele Error Code

Evaporator Sensor Fault

The F1 error code means the evaporator temperature sensor (NTC) is giving an incorrect, out-of-range, or no reading. The refrigerator cannot properly regulate cooling.

~20%

DIY Fixable

$100-300

Typical Repair Cost

30 min – 1.5 hrs

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Maybe. The fridge may still cool but without accurate temperature control. Monitor food temperatures closely. If the compressor runs non-stop, it may freeze items.

Can I reset the code?

Yes. Yes — a power reset may clear a transient fault. If the sensor has failed, the code will return.

When to stop immediately?

Stop if you notice: Compressor runs without stopping, Food is freezing or not cooling.

Symptoms You May Notice

Inconsistent cooling

Fridge runs too cold or not cold enough

Compressor runs constantly

Without sensor feedback the compressor may not cycle off

F1 on display

Evaporator sensor fault

Possible Causes

1

Sensor Wire Disconnected

Vibration has loosened the sensor connector.

DIY Possible
2

Sensor Failed

The NTC thermistor has failed open or short.

Requires Professional
3

Ice on Sensor

Excessive frost has encased the sensor, giving false readings.

DIY Possible
4

Control Board Fault

The board cannot read the sensor signal.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Power Reset

    Turn off the refrigerator at the mains for 5 minutes, then turn back on.

    A transient signal glitch may clear.

  2. 2

    Check for Frost Buildup

    Look at the rear wall inside the fridge. Excessive frost near the evaporator area suggests a defrost issue affecting the sensor.

    If heavily frosted, a manual defrost (24 hrs off) may help.

  3. 3

    Monitor Temperatures

    After reset, monitor the display temperature for 4-6 hours.

    If temperatures stabilize, the fault was transient.

When to Call a Professional

Contact a qualified Miele technician if:

  • Sensor resistance out of spec
  • Sensor wiring damaged
  • Board sensor circuit failed
  • Under warranty

Need Professional Help?

Find qualified Miele technicians in your area for proper diagnostics and repair.

Schedule Appointment

More Refrigerator Error Codes

View all codes →
F13 F14 F12 F11 F10 F9 F7 F8 F6 F5 F4 F3