Samsung · Oven Moderate

C-23 — Cooling System Fault

Samsung's own service documentation for this code lists C-23 as a cooling-system fault, directing the technician to check the cooling system. This is not the meat/temp probe circuit — that's a different code (C-22 / 'Temp probe malfunction' on newer models, E-2E on older ones). C-23 points to the fan and airflow path that keeps the oven's electronics compartment from overheating.

Keep using it?
Yes, with caution
DIY difficulty
Moderate

How to fix it

  1. Unplug the range or shut off the breaker and let it cool.
  2. Locate the cooling fan (typically behind the control panel or near the back of the unit) and clear any visible dust or grease blocking the vents.
  3. Spin the fan blade by hand to confirm it turns freely.
  4. With power restored briefly and the oven running a cycle, listen/check whether the cooling fan is actually spinning.
  5. If the fan doesn't run, unplug the unit and check its harness connector at both ends for looseness or damage.
  6. Test the fan motor with a multimeter; replace it if it doesn't show continuity.
  7. If the fan and harness check out, the fault is likely on the main control board — replace it.

Why it happens

Typical signs: C-23 on display · Oven may shut down heat mid-cycle · Control panel or electronics area feels unusually warm · Cooling fan (if audible on your model) sounds weak, intermittent, or silent

  • Failed or seized cooling fan motor The fan that cools the control board/electronics compartment has stopped running or is running too slowly.
  • Blocked cooling vents Dust, grease buildup, or an obstruction is restricting airflow through the cooling fan path.
  • Cooling fan harness fault Loose or damaged connector between the fan and the main control board.
  • Main control board fault The board isn't driving the cooling fan or isn't reading its feedback correctly.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Samsung oven cooling fan motor Common replacement
    Amazon →
  • Samsung oven main control board Common replacement
    Amazon →

More Samsung oven codes

---- ---- — Invalid Temperature Setting -dC- -dC- — Flex Duo Divider Missing or Removed -dE- -dE- — Flex Duo Divider Not Installed bAd LinE bAd LinE — Bad Power Connection C-10 Range C-10 — Temperature Sensor Reading Error C-20 C-20 — Oven Temperature Sensor Open/Short

All Samsung codes → All oven codes →

Frequently asked questions

What does the C-23 code mean on a Samsung oven?

Samsung's own service documentation for this code lists C-23 as a cooling-system fault, directing the technician to check the cooling system. This is not the meat/temp probe circuit — that's a different code (C-22 / 'Temp probe malfunction' on newer models, E-2E on older ones). C-23 points to the fan and airflow path that keeps the oven's electronics compartment from overheating.

What causes the C-23 code on a Samsung oven?

Failed or seized cooling fan motor: The fan that cools the control board/electronics compartment has stopped running or is running too slowly. Blocked cooling vents: Dust, grease buildup, or an obstruction is restricting airflow through the cooling fan path. Cooling fan harness fault: Loose or damaged connector between the fan and the main control board.

Is it safe to keep using a Samsung oven with a C-23 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix C-23 on a Samsung oven?

Unplug the range or shut off the breaker and let it cool. Locate the cooling fan (typically behind the control panel or near the back of the unit) and clear any visible dust or grease blocking the vents. Spin the fan blade by hand to confirm it turns freely.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.