E12
Scotsman Evaporator Thermistor Short Circuit

Display shows 'E12' and unit shuts down

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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

Thermistor leads shorted together, water intrusion into sensor, crushed harness, failed thermistor

How to Fix / Troubleshooting

Safety: Turn off power before working on wiring.

  • Inspect sensor and harness: Look for damaged insulation, pinched wires, or moisture around the thermistor.
  • Disconnect and test: Unplug the thermistor from the control board and measure resistance. A near-zero reading indicates a shorted sensor. Replace if defective.
  • Check routing: Reroute the harness away from sharp edges or hot components to prevent future damage.
  • Control board check: If a new thermistor still shows E12, the control board input may be shorted and require replacement.
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Repair Difficulty

Medium 3/5

Required Part

Evaporator Thermistor
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