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C-20

Microwave temperature sensor open or short circuit

C-20 indicates that the microwave temperature sensor is open-circuit or short-circuit.

What this code means

C-20 indicates that the microwave temperature sensor is open-circuit or short-circuit.

Possible causes

  • Temperature sensor fault
  • Sensor wiring fault
  • Internal electronic fault

Common symptoms

  • C-20 displayed
  • Microwave may stop or refuse normal operation

Checks to make

  1. Unplug the microwave from the mains
  2. Do not continue using it while the code remains
  3. Contact Samsung service for diagnosis

Safety

  • Microwave ovens contain hazardous high-voltage components that can retain charge after unplugging. Internal repairs should only be carried out by qualified technicians.

Model notes

Samsung groups C-20 with E-21 and E-22 as temperature-sensor open/short faults.