Carafe does not fill to the selected cup level; brews less coffee than expected.

Safety first: Unplug before internal checks.

• Verify water fill: Ensure you are filling the reservoir to the correct marking for the desired number of cups.
• Descale: Run a descaling cycle with vinegar and water to restore full flow.
• Run multiple cycles: Run two back-to-back water-only cycles to purge air and confirm consistent volume.
• Board calibration issue: If the unit consistently underfills by the same amount, the flow timing on the control board may be off and the board may need replacement.