ERR2
GE Appliances
Temperature Sensor Short / Overheat Detection
Display shows “ERR2” and brewing stops or will not start.
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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
Shorted thermistor, Thermistor wires pinched against metal chassis, Moisture on sensor connector, Control board fault reading sensor
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker and let it cool before inspection.
- 1. Inspect for moisture: Remove the base or rear cover and check around the heater and sensor for any water or coffee leaks. Dry thoroughly with a cloth and allow to air dry.
- 2. Check thermistor wiring: Look for damaged insulation or wires pinched between panels. If wires are shorted together or to the chassis, carefully reposition and insulate them with high-temperature electrical tape.
- 3. Reseat sensor connector: Disconnect and reconnect the thermistor plug at the control board to clear any poor contact.
- 4. Test thermistor resistance: With a multimeter, measure resistance at room temperature. A near-zero reading suggests a shorted sensor. Replace if readings are abnormal.
- 5. If ERR2 persists: The control board’s sensor input circuit may be damaged and the main control board may need replacement.
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Repair Difficulty
Hard
4/5
Required Part
Thermistor / Main Control Board
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