Mr. Coffee Airlock / Severe Scale in Heater

Coffee maker makes loud gurgling or sputtering noises but produces little or no coffee.

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.

Possible Causes

Air trapped in heater tube, Heavy mineral deposits restricting flow, Low water level causing pump cavitation, Failing vibration pump

Safety first: Unplug and allow the unit to cool before handling.

Fill reservoir fully:
- Ensure reservoir is filled to MAX to help purge air.
Run multiple water-only cycles:
- Run 2–3 cycles with plain water to push air through the system.
Descale:
- If noise persists, perform a full descaling cycle with vinegar and water.

If the unit continues to gurgle without producing coffee, the pump or heater may be failing and should be checked by a technician.

Medium 3/5

Vibration Pump

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