ERR 3
Cuisinart
Heater Circuit Failure
Display shows “ERR 3” and the unit will not heat or brew.
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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
Open heating element in boiler or hot plate, Blown thermal fuse, Loose or burned heater wiring, Failed heater relay on control board
How to Fix / Troubleshooting
Safety first: Unplug the unit. Internal heater circuits carry mains voltage and can be dangerous.
- External checks only: For non-technicians, limit yourself to checking the power cord and outlet. Try another appliance in the same outlet to confirm power.
- Reset attempt: After 10–15 minutes unplugged, plug the unit back in and see if the error clears. If not, internal components are likely failed.
- Technician steps (summary): A professional will open the base, test continuity of the heating element and thermal fuse, and inspect the heater relay on the control board. Any open component must be replaced with the correct Cuisinart-rated part.
- Do not bypass fuses: Never bypass a thermal fuse or thermostat; this can create a serious fire hazard.
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Repair Difficulty
Professional Required
5/5
Required Part
Heating Element / Boiler Assembly
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