Hamilton beach flexbrew coffee maker not pumping water

Pour 2 cups (1 pint) of plain white vinegar into the carafe water reservoir. Be sure to place the carafe on the hot plate to catch the vinegar. Press the BREW NOW I/O button once. After 30 seconds, press the BREW NOW I/O button again to stop the brewing and allow the vinegar to clean.

When your coffee maker stops pumping water, the appliance probably needs to be descaled. Hard water build-up may be affecting your coffee machine's ability to pump water through it to make coffee. Simply run a descaling cycle to clear the build-up.

Fill your coffee maker's water chamber halfway with white vinegar. Fill it the rest of the way with water. Put a paper filter in the basket to catch any hard water deposits or other debris that may be loosened. Brew half of the water/vinegar mixture, then turn your coffee maker off.