Display shows E05 and the brew cycle will not start or stops with beeping.

Safety first: Unplug the coffee maker before reaching under the brew basket or around the warming plate.

• Check carafe position: Slide the glass or thermal carafe fully back so it is centered on the warming plate. Some Calphalon models use a carafe presence switch under the plate that must be depressed.
• Inspect drip-stop mechanism: Open the top lid and remove the brew basket. Verify the spring-loaded drip-stop plunger moves freely and is not jammed with coffee grounds. Rinse the basket and plunger thoroughly.
• Reinstall brew basket: Insert the basket so it sits flat and the handle aligns correctly. Close the lid firmly until it clicks.
• Test without coffee: With an empty basket and carafe in place, plug the unit back in and start a small brew cycle. If it runs, the issue was mechanical alignment.
• If E05 remains: The carafe or basket microswitch may be defective or misaligned inside the housing. This requires disassembly to adjust or replace the switch; seek professional service.