Keurig · Coffee Maker Moderate

Prime Error — pump cannot draw water

Shown when the brewer's pump fails to draw water from the reservoir into the internal tank — usually an air lock, blocked intake screen, or failing pump.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Typical cost
$10-15
Verified against
keurig.com ↗

The fix

Keurig Descaling Solution

Air lock or scale preventing the pump from drawing water

$10-15 easy difficulty 45 min

Diagnose first: Cleaning the reservoir intake screen and burping the pump are free and fix most Prime Errors. Descale only if it still won't prime afterward — a genuinely failed pump is not consumer-replaceable on most models, so if descaling doesn't help, replacement of the brewer is the realistic option.

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How to fix it

  1. Remove the reservoir; clean the small intake screen at the bottom of the brewer with a clean toothbrush under warm water
  2. Refill the reservoir and reseat firmly
  3. Burp the unit: invert over a sink, tap the bottom firmly for 30 seconds, set upright and try again
  4. Run a water-only cycle to re-prime the pump
  5. If still failing, descale to clear scale from internal lines
  6. If no flow after descale + burping, the pump has failed and the brewer typically needs replacement

Why it happens

Typical signs: 'Prime' or 'Not Ready' on display · Pump cycles but no water moves · No water dispensed after pressing brew · Loud pump noise without flow

  • Air trapped in pump Common after running reservoir dry
  • Clogged reservoir intake screen Debris or scale blocking the small mesh at the bottom of the reservoir
  • Failed pump Vibratory pump worn out
  • Cracked internal tubing Pump sucking air instead of water

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.