Name: Samsung NQ70M7770DG
Brand: Samsung

Question 1

What does error code C-20 mean on Samsung NQ70M7770DG?

Accepted Answer

Temperature sensor open circuit or short detected during operation. Cause: Oven sensor connector disconnected at Main PCB; Oven sensor connector disconnected at sensor; Open circuit in oven sensor wire harness; Short circuit in oven sensor wire harness; Defective oven temperature sensor; Main PCB failure.

Question 2

What does error code C-21 mean on Samsung NQ70M7770DG?

Accepted Answer

Temperature exceeds safe operating limits. Cause: Defective oven sensor providing false high reading; Shorted sensor wire or connector; Defective broil, bake, or convection heater; Stuck relay on Main PCB; Disconnected wire harness on Main PCB.

Question 3

What does error code C-23 mean on Samsung NQ70M7770DG?

Accepted Answer

Temperature probe sensor short circuit detected. Cause: Meat probe shorted circuit; Damaged probe wire or connector; Shorted probe connector on Main PCB; Defective meat probe thermistor.

Question 4

What does error code C-30 mean on Samsung NQ70M7770DG?

Accepted Answer

PCB internal temperature sensor malfunction. Cause: PCB temperature sensor failure; Loose or disconnected sensor connector; Defective Main PCB.

Question 5

What does error code C-31 mean on Samsung NQ70M7770DG?

Accepted Answer

Control board temperature exceeds safe limit. Cause: Excessive ambient temperature; Defective temperature monitoring circuit; Short circuit in control board.

Question 6

What does error code C-70 mean on Samsung NQ70M7770DG?

Accepted Answer

Steam temperature sensor circuit open or shorted. Cause: Steam sensor connector disconnected at Main PCB; Steam sensor connector disconnected at sensor; Open circuit in steam sensor wire harness; Short circuit in steam sensor wire harness; Defective steam temperature sensor; Main PCB failure.

Question 7

What does error code C-72 mean on Samsung NQ70M7770DG?

Accepted Answer

Water not draining from oven cavity after cycle completion. Cause: Defective water level sensor; Drain pump not operating; Water pump motor failure; Loose or disconnected wire connections; Defective Main PCB.

Question 8

What does error code C-A2 mean on Samsung NQ70M7770DG?

Accepted Answer

Magnetron or convection cooling fan not operating correctly. Cause: Cooling motor connector disconnected at Main PCB; Cooling motor connector disconnected at motor; Cooling motor malfunction; Defective cooling motor windings.

Question 9

What does error code C-d0 mean on Samsung NQ70M7770DG?

Accepted Answer

Shorted keypad keys detected. Cause: Keypad cable disconnected from Sub PCB connector; Shorts between Sub PCB connector and keypad cable; Defective Sub PCB.

Question 10

What does error code C-d1 mean on Samsung NQ70M7770DG?

Accepted Answer

Door lock mechanism positioned incorrectly or not functioning. Cause: Door lock switch improperly connected; Door lock motor malfunction; Incorrect door lock motor resistance; Insufficient voltage to door lock motor; Door locking switch failure.

NQ70M7770DG

Error Codes

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Code	Meaning	Severity
C-20	Temperature sensor open circuit or short detected during operation	Critical
C-21	Temperature exceeds safe operating limits	Critical
C-23	Temperature probe sensor short circuit detected	Critical
C-30	PCB internal temperature sensor malfunction	Critical
C-31	Control board temperature exceeds safe limit	Critical
C-70	Steam temperature sensor circuit open or shorted	Critical
C-72	Water not draining from oven cavity after cycle completion	Critical
C-A2	Magnetron or convection cooling fan not operating correctly	Moderate