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Miele coffee machine fault codes sort into three families: heat faults (F1, F2, F3, F4, F80, F81, F82, F83) mean the machine overheated or sat in a room that was too cold; water faults (F10, F17) mean water is not being taken in, usually a dirty intake filter or scale; and mechanical faults (F28, F73, F74, F75, F76, F77, F226) point at the brew unit, valves, or a jammed capsule. Most have a documented self-fix, and every meaning below comes from Miele's own USA support pages, cited at the end. Anything that survives its fix steps is a Miele Service call, full stop.
The fault code table
| Code | What it means (per Miele) | What to do |
|---|---|---|
| F1, F2, F3, F4, F80, F81, F82, F83 | Heat-related problem | If overheated: switch off and let it cool for 1 hour. If the room sat below 50 F (10 C): bring the room above 60 F (15 C) for an extended period before using it again |
| F10 | Water is not being taken in | Fill the tank 3/4 with fresh water and insert and remove it 10 to 20 times; clean the water intake filter in the tank recess (rinse with water only); then descale |
| F17 | Too little water is being taken in | Same drill as F10: flush the intake, clean the intake filter with the cross facing upward, then descale |
| F28 / Clean brew unit by hand | Too much ground coffee in the brew unit, or a blocked grinder channel | Switch off 2 minutes; use the correct portion (CM 7xxx: 2 level scoops, CM 6xxx and CVA: 1 level scoop, CM 5xxx: 12 g); vacuum out the ground coffee chute if blocked |
| F73 / FAULT 73 | Brew unit cannot move into its home position | Confirm with OK, power off, unplug 2 minutes; remove and rinse the brew unit, push the coffee ejector into position, switch on so the drive re-initializes, then reinsert the brew unit. Recurs: less coffee and/or a finer grind |
| F74 | Fault during valve adjustment; the valve needs descaling | Switch off and on; then run START DESCALING from the maintenance menu (it cannot be canceled once started) |
| F75, F76 | A coffee capsule has jammed (capsule models) | Empty the grounds container, reseat the carousel runners; if it persists, cut power and free the capsule with a wooden spoon handle, never fingers or metal |
| F77, F226 | Valve initialization fault | Disconnect from power, reconnect. If it returns, Miele Service |
Why the power-cycle fix is real, not folklore
The mechanical codes (F73, F74, F77, F226) are the machine failing a motorized self-check on the brew unit or valves at startup, and cutting power forces a full re-initialization; that is why Miele's own fix for the valve faults is literally unplug and replug. The water faults are the opposite: F10 and F17 are almost always debris on the intake filter or scale in the valve, which is why both procedures end in a descale with Miele descaling tablets, the chemistry the machine's seals are specified for.
The mistake people make
Going past the documented steps. A Miele that still throws a heat fault after cooling, or a valve fault after a power cycle, has a sensor or heater problem behind panels carrying mains wiring, and Miele's answer on every one of these pages is the same: contact Miele Service. Run the repair-or-replace math in is my coffee maker worth fixing before authorizing anything, and since two of the eight rows end in descale, know the difference: descaling vs cleaning, explained.
Related reading
FAQ
What does F73 mean on a Miele coffee machine? The brew unit cannot move into its home position. Unplug for 2 minutes, rinse the brew unit, push its coffee ejector into position, switch on so the drive re-initializes, then reinsert the brew unit. If it recurs, use less coffee or a finer grind.
What does F77 mean on a Miele coffee machine? A valve initialization fault. Disconnect the machine from power and reconnect it; if the code returns, it needs Miele Service.
Why does my Miele show a heat fault like F1 or F82? The machine overheated or its room was too cold. Cool it for 1 hour if overheated; if the room sat below 50 F, keep it above 60 F for an extended period before switching on again.
Sources: every code meaning and fix above is from Miele USA's official per-fault support pages, verified for this article: heat faults F1-F4/F80-F83, F10, F17, F28, F73, F74, F75/F76, F77, and F226 (mieleusa.com). Procedures vary slightly between countertop CM and built-in CVA models; match your model's page.
Never miss a cycle: the free one-page Machine Maintenance Calendar (PDF) puts every daily, monthly, quarterly, and yearly task for espresso machines, drip, Keurig, and moka pots on a card you can tape inside a cabinet.
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