Bodum programmable coffee maker displays E3 and does not heat water; pump may run briefly but no hot water reaches the filter basket.

Safety first: Unplug the coffee maker. Heating circuits carry mains voltage and can be dangerous. If you are not experienced with electrical testing, limit yourself to visual checks and cleaning.

Steps to try:

• Check for dry-run condition: Confirm you always fill the reservoir above the MIN line before brewing. Running the heater dry can blow the thermal fuse.
• Reset attempt: Unplug the unit for 15 minutes, then plug back in and try a small brew cycle with water only. If E3 appears immediately and no heating occurs, the heater circuit is likely open.
• Inspect power cord and base: Look for damage to the cord, plug, or base. Do not use the machine if the cord is frayed or burnt.
• Internal inspection (advanced): With the unit unplugged, remove the bottom cover. Locate the aluminum heating tube and attached thermal fuse (small cylindrical component wrapped in heat-resistant sleeve). Check for burnt spots, broken leads, or disconnected spade terminals.
• Test continuity (advanced): Using a multimeter set to continuity or ohms, test across the heating element terminals and across the thermal fuse. An open reading indicates a failed component that must be replaced, not bypassed.

Important: Never bypass a thermal fuse. It is a critical safety device. If the heater or fuse is open, replace the entire heater/thermal fuse assembly or have a technician perform the repair.