C-31 Serious Moderate DIY

Samsung Oven C-31 — High Temperature Around Main PCB

Samsung Oven · Error code C-31

What C-31 Means

The control board is reading excess ambient temperature in its own compartment. Usually a cooling/airflow problem rather than a board defect.

Symptoms

  • C-31 after long bake or self-clean
  • Control panel feels unusually hot
  • Cooling fan sounds weak or stopped
  • Code clears after a long cooldown

Common Causes

1
Failed PCB cooling fan

Fan motor open or seized.

2
Blocked oven vent

Hot air diverted toward the control compartment.

3
Insulation displaced

Cavity insulation shifted, exposing PCB area to cavity heat.

4
Built-in wall oven cabinet without required clearance

Install cabinet too tight, trapping heat.

How to Fix It

  1. Let the oven cool completely before testing.
  2. Confirm the cooling fan spins freely and runs during bake — replace if open or seized.
  3. Clear any blocked oven vent (see C-24).
  4. For built-in wall ovens, verify the cutout meets Samsung's required clearance per the install manual.
  5. Inspect cavity insulation behind the control panel for displacement.
  6. If airflow and fan are good and the code returns, replace the main control board.

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.

Common replacement Samsung oven cooling fan motor View on Amazon→

More Samsung Oven Codes

---- ---- — Invalid Temperature Setting -dC- -dC- — Flex Duo Divider Installed in Single Mode -dE- -dE- — Flex Duo Divider Not Installed bAd LinE Range bAd LinE — Power Connection Error bAd LinE bAd LinE — Bad Power Connection C-10 Range C-10 — Temperature Sensor Reading Error

All Samsung codes → All oven codes →

Verified against manufacturer documentation: appliancemode.com

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