Keurig · Coffee Maker Moderate

Frother Error — Keurig K-Cafe Frother Error — milk frother fault

Specific to K-Cafe and K-Cafe Smart models with the built-in milk frother. Indicates the frother isn't sitting on its base correctly, the whisk is missing or stuck, or the frother base contacts are dirty.

Keep using it?
Yes, with caution
DIY difficulty
Easy
Typical cost
$8-15
Verified against
keurig.com ↗

The fix

Keurig K-Cafe replacement frother whisk

K-Cafe frother whisk missing, jammed, or contacts dirty

$8-15 easy difficulty 10 min

Diagnose first: Wash the pitcher/whisk and dry the base contacts first — dried milk residue causes most Frother Errors. Only buy a replacement whisk if it's visibly missing, cracked, or the magnet no longer grabs it.

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How to fix it

  1. Remove the frother pitcher and confirm the magnetic whisk is in place at the bottom
  2. Wash the pitcher and whisk with warm soapy water and dry thoroughly
  3. Wipe the base contact area dry
  4. Reseat the pitcher firmly on the base
  5. Fill milk between MIN and MAX lines only
  6. Press the frother button — light should be solid, not flashing

Why it happens

Typical signs: Frother light flashes red · Frother won't start · Latte/cappuccino button does nothing · Frother overheats and shuts off

  • Frother not seated on base Pitcher misaligned with magnetic drive
  • Whisk missing or stuck Magnetic whisk fell out or is jammed by milk residue
  • Dirty contacts Dried milk on base or pitcher bottom
  • Overfilled past MAX line Too much milk triggers overflow protection

More Keurig coffee maker codes

Add Water Add Water Light — reservoir low or sensor fault All Lights Blinking All Lights Blinking — internal water flow or sensor fault Auto Off Auto Off — power-save shutdown Brewer Needs Reset Brewer Needs Reset — control board lockup Brew Interrupted Brew Interrupted — cycle aborted mid-brew Descale Light Descale Light — mineral buildup detected

All Keurig codes → All coffee maker codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: keurig.com.