Mr. Coffee Underfill / Flow Meter or Restriction Issue

Single-serve brewer dispenses much less coffee than the selected cup size.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Scale buildup in heater or tubing, Partially clogged pod holder, Faulty flow meter (if equipped), Incorrect cup size calibration

How to Fix / Troubleshooting

Safety first: Unplug and cool before descaling.

  • Descale:
    • Run a full descaling cycle with vinegar and water.
  • Clean pod holder:
    • Remove and wash pod holder and drip tray.
  • Test with water only:
    • Run a cycle without a pod and measure output; compare to selected size.

If underfilling persists, the flow meter or control board calibration may be faulty and require technician adjustment or replacement.

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Repair Difficulty

Hard 4/5

Required Part

Flow Meter
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