E04
Kenmore
Thermal Sensor / NTC Error
E04 appears and the coffee maker stops heating; water passes through but is lukewarm or cold.
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Safety Warning
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.
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Possible Causes
Failed NTC temperature sensor, Loose sensor wiring to control board, Open thermal fuse on heater plate, Corroded sensor contacts on heating block
How to Fix / Troubleshooting
Safety first: Unplug the unit and let it cool completely. Heating components can remain hot for 30+ minutes.
- Reset and test: Unplug for 10 minutes, then plug back in and attempt a brew. If E04 returns immediately, proceed to inspection.
- Access heater area: Remove bottom cover to expose the aluminum heating block or hot plate assembly. Locate the small temperature sensor (NTC) clipped or screwed to the heater.
- Check sensor connection: Ensure the sensor wires are firmly connected to the control board and not pinched or broken. Reseat any plug-in connectors.
- Inspect thermal fuse: Look for an inline thermal fuse attached to the heater wiring. If it appears burnt or tests open with a multimeter, replace it with the same temperature and current rating.
- Replace NTC sensor: If wiring is intact but E04 persists, the NTC sensor is likely out of range. Replace the temperature sensor with a compatible Kenmore part.
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Repair Difficulty
Hard
4/5
Required Part
Temperature Sensor (NTC) for Heating Block
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