Samsung · Oven Moderate

C-F2 — Internal Communication Error

Communication failure between internal circuit boards (commonly main PCB and a secondary sub-PCB on dual-cavity or higher-end models).

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
samsung.com ↗

How to fix it

  1. Power-cycle at the breaker for 5 minutes.
  2. Open the rear/control access and reseat all inter-board connectors.
  3. Inspect harnesses for heat damage; replace if conductors are exposed.
  4. If the secondary cavity or feature is single-affected, replace the sub-PCB first.
  5. If the issue persists, replace the main control board.

Why it happens

Typical signs: C-F2 displayed · One cavity works, the other doesn't (dual-cavity models) · Random feature failures · Code returns after a reset

  • Loose internal harness Inter-board harness unseated.
  • Failed sub-board Secondary control PCB has failed.
  • Damaged inter-board cable Cable insulation/conductors damaged by heat.
  • Failed main control board Main PCB comm port failed.

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 sub PCB Common replacement
    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 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 →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: samsung.com.