Refrigerator Medium Severity
F5 Miele Error Code

Defrost Fault

The F5 error code means the automatic defrost system has failed. The evaporator coils are frosting up and the defrost heater, timer, or sensor is not working to clear the frost.

~30%

DIY Fixable

$150-350

Typical Repair Cost

1-3 hrs

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Maybe. The fridge will continue to cool but with reduced efficiency. A manual defrost buys time, but the root cause needs to be addressed.

Can I reset the code?

Yes. A manual defrost effectively resets the situation. If the defrost heater or sensor has failed, frost will return within days.

When to stop immediately?

Stop if you notice: Frost returns within 1-2 days of defrost, Compressor runs non-stop.

Symptoms You May Notice

Excessive frost on rear wall

Thick frost or ice on the back wall inside the fridge

Reduced cooling

Frost-covered evaporator cannot absorb heat efficiently

Water leaking inside fridge

Partial defrost causes water to drip

F5 on display

Defrost system fault

Possible Causes

1

Defrost Heater Failed

The heating element that melts frost has burned out.

Requires Professional
2

Defrost Sensor/Thermostat Failed

The sensor that triggers defrost has failed.

Requires Professional
3

Defrost Timer/Board Fault

The control that schedules defrost cycles has failed.

Requires Professional
4

Door Seal Issue

Warm moist air entering creates excessive frost.

DIY Possible
5

Drain Line Blocked

Defrost water cannot drain, refreezes and blocks the evaporator.

DIY Possible

Safe Checks You Can Do

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

    Manual Defrost

    Turn off the refrigerator and leave doors open for 24 hours to fully defrost.

    Remove all food first. Place towels to collect water.

  2. 2

    Check Door Seals

    Close the door on a piece of paper. If the paper slides out easily, the seal is worn.

    Clean seals with warm soapy water — dirt prevents a good seal.

  3. 3

    Check Drain Hole

    Inside the fridge, find the drain hole (usually bottom rear). Clear any blockage with a pipe cleaner or warm water.

    A blocked drain is a very common cause of frost issues.

  4. 4

    Restart and Monitor

    After full defrost, plug back in and monitor for frost return over the next 48 hours.

    If frost returns quickly, the defrost heater or sensor has failed.

When to Call a Professional

Contact a qualified Miele technician if:

  • Defrost heater open circuit
  • Defrost sensor failed
  • Defrost board fault
  • 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 →
F14 F13 F12 F11 F10 F9 F7 F8 F6 F4 F3 F1