Written by
Maya Chen Appliance Repair Content SpecialistPublished October 20, 2026
Content statusVerified
Error codeF121
ApplianceRefrigerator
Quick answer
F121 on a Miele refrigerator means the ice cube maker is defective; the manual lists restart and water inlet checks.
Model compatibility
Miele reuses codes across series and model years, so F121 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What thiscode means
Ice cube maker defective (voltage fluctuation, no/low water pressure, or mechanical/electrical fault).
F121 appears in the display of a Miele refrigeration appliance and tells you the ice cube maker is defective. Miele lists several causes.
Voltage fluctuations
Fluctuations can make the system fail. Switch the appliance off and back on again.
No water supply
Check that the water inlet is open.
Water pressure too low
With low connection pressure, the water intake valves leak and drip, and ice starts to form on the ice cube maker, which leads to a mechanical blockage. Contact the facility manager, a plumber or Miele Customer Service.
For an ice maker that keeps showing F121, call (310) 742-0025 or read about refrigerator repair. Tell us whether you restarted it and checked the inlet.
Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Get started
Seeing this code on your Miele appliance?
Book an on-site visit in Los Angeles County or Orange County. We diagnose the appliance that is showing the code and give a written estimate before any repair.
Miele MasterCool® refrigeration diagnostics and repair — cooling loss, frost, leaks and dispenser faults. Refrigerator service is booked as an on-site visit in Los Angeles County and Orange County.
Tell us about your Miele —we’ll take it from there
Request a repair visit for a Miele appliance in Los Angeles County or Orange County. Share the model and symptom — or call and we will take the details.
