Miele KF 1813 Vi 04 Ice Maker Not Making Ice: What F0121/F121 Means

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Before clearing the code, take a photo of the entire display and the rating label, and record the full model exactly as printed, including KF 1813 Vi 04 if present. Confirm that the appliance is in the United States/Canada documentation family before using the Miele US instructions.

   Expected result: The display clearly shows F0121, F121, or a different code, and the label either matches KF 1813 Vi 04 or shows another model/market.

   Next step: If the code or model does not match, stop applying this page and give the photo and label to the facility manager or Miele. If it matches, continue with external checks only.

   Stop if: Do not enter service mode, remove the front or rear panels, or order a part from the code alone.

   Why this matters

   Why: Miele's opened support page uses F121, while the assigned topic uses F0121. A leading-zero difference must not be silently treated as the same code, and a KF 1803/1813 family manual does not prove fit for every suffix or market.

2. Check 2

   With hands and the floor dry, look only at the accessible water shutoff, visible supply line, and the area around the ice-maker connection. Confirm the shutoff is open and the line has not been visibly kinked or crushed; do not pull the integrated refrigerator out or loosen a fitting.

   Expected result: The supply is closed, the visible line is kinked, there is active dripping, or ice is forming around the ice-maker inlet; alternatively, the visible path is open, dry, and undamaged.

   Next step: For a closed or visibly kinked line, notify the facility manager before moving the built-in unit. For a leak or ice-forming pattern, leave the ice maker off and contact the facility manager or a plumber; if the installation side is normal, continue to the next check and arrange Miele Service if the code returns.

   Stop if: Do not disconnect the water line, chip ice, thaw the mechanism with heat, measure pressure yourself, or tighten a concealed fitting.

   Why this matters

   Why: The KF 1813 Vi documentation requires an open cold-water supply, a separate shutoff, and a 25–80 psi supply. Miele says low pressure can make the intake valves drip and cause ice to form on the maker, leading to a mechanical blockage. A dry, open visible path does not rule out an internal valve or pressure problem.

3. Check 3

   Check the visible control state without opening the appliance: the refrigerator/freezer is on, the ice-maker control is enabled, the ice container is seated and completely closed, and no loose cubes are visibly blocking the container exit. Do not reach into the ejector mechanism.

   Expected result: The appliance or ice maker is off, the container is not fully seated/closed, or loose ice is visibly blocking the exit; otherwise these conditions are correct.

   Next step: Correct only the obvious control or container position described by the manual, then wait for the documented production interval. If the code remains or the container cannot seat normally, stop and contact Miele Service or the facility manager.

   Stop if: Do not force the drawer, insert tools, touch moving ejector parts, or dismantle the ice maker.

   Why this matters

   Why: Miele's KF 1813 Vi instructions state that the maker must be connected to the household water supply, enabled, and used with the container correctly positioned and closed. A correct control/container state makes the F0121 water-path or appliance-fault branches more relevant.

4. Check 4

   If this is the first start after installation or a long period out of service, allow the freezer to reach operating temperature and wait through the manual's startup interval. The KF 1813 Vi instructions say first ice can take up to 10 hours; do not repeatedly toggle the maker while waiting.

   Expected result: Ice begins to drop after the interval and no fault returns, or no ice appears and F0121/F121 returns or remains visible.

   Next step: If ice production begins and the code stays away, monitor normally. If the code returns or no ice persists, provide the photos and observations to the facility manager and request Miele Service; do not try an internal reset sequence.

   Stop if: Do not run the maker with a visible leak, an ice blockage, or an unconfirmed water connection.

   Why this matters

   Why: A first-start delay can be normal, but a persistent fault after the control, container, and visible water checks is not explained by waiting alone. In a rental, repeated resets can also obscure the original code needed by the service provider.

5. Check 5

   Compare the complete F0121/F121 observation with the two safe service routes: installation-side signs go to the rental facility manager or plumber, while an open, dry supply with a returning code goes to Miele Service. Provide the model suffix, market, code photo, water-path photo, and whether the freezer is otherwise cooling.

   Expected result: There is a visible leak/ice formation or supply issue, or the water path appears normal but the code and no-ice symptom persist.

   Next step: For an installation-side pattern, keep the maker off and contact the facility manager/plumber. For a normal visible path with a returning code, request Miele Service through the manager or the authorized service route.

   Stop if: Do not replace the water filter or valve, remove covers, bypass the ice-maker sensor, or use an unconfirmed part solely because F0121 is displayed.

   Why this matters

   Why: Miele distinguishes low-pressure/installation causes from a mechanical or electrical ice-maker fault. The distinction changes who should assess the next step; it does not authorize the tenant to test the valve or ice-maker assembly.