Samsung · Range / Oven error code

C-30 / C-31Control board temperature sensor fault / board over-temperature

Single source High-voltage / caution

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Related diagnostic guides

Guide · Range / Oven

Oven cooling fan keeps running after the oven is off (or never runs)

Electric and many gas ranges and wall ovens have a cooling fan that protects the controls, door and cabinetry; it keeps running after the oven is off until the controls area cools, and cannot be switched off. Running for a while after a long or hot bake is normal; running with the oven cold, starting at power-up or never stopping points to a fan thermostat stuck closed, a welded relay, a bad temperature sensor reading or a control fault. A fan that never runs is a safety issue because the controls overheat.

8 steps ~60 minmoderate

Guide · Range / Oven

Oven keeps heating when turned off or overheats past setpoint

This is a fire hazard: turn the breaker off first, then diagnose. On electronic controls the usual cause is a relay on the control board whose contacts have welded closed. On dial ovens it is a stuck thermostat or selector contact. Less often a shorted sensor or harness is to blame. On gas ovens, a burner that won't shut off is a gas-valve problem and goes to a licensed gas technician.

7 steps ~60 minadvanced

Guide · Range / Oven

Gas oven lights then goes out, or keeps re-igniting

First separate normal cycling from a fault: the burner shuts off and relights to hold temperature. On glow-bar (hot-surface) ovens, a weak igniter can glow but pass too little current to hold the safety valve open, so the flame drops out. On direct spark ignition (DSI) ovens the module must sense the flame through the ground path; a poor ground, reversed polarity, a dirty or cracked electrode or a failing DSI module makes it lose the flame and re-spark. The gas valve, pressure and orifices are licensed gas-technician work only.

8 steps ~60 minmoderate

More Samsung range / oven codes

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-dC- / -dE-

Divider (partition) not detected correctly

Cross-checked

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bo / bs

Inverter (IGBT) sensor open (bo) or shorted (bs)

Cross-checked High-voltage / caution

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C-10

Self-diagnosis notice

Single source

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C-20 / C-21 / C-22

Oven temperature sensor fault / over-temperature

Cross-checked High-voltage / caution

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C-24

Oven heating too fast / vent blocked

Cross-checked High-voltage / caution

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C-d0

Button held too long

Cross-checked