Code: C-F0♨️ Samsung Oven

Samsung Oven C-F0 Error Code: Main and Sub Board Communication Error (Meaning, Causes, Fixes)

Reviewed 2026-10-25 · Based on 6 manufacturer & service sources

What the code means

Samsung's oven information-code pages (UK, New Zealand and Singapore versions) list C-F0 as appearing "if there is no communication between the main PCB and sub PCB". Samsung's US range and wall oven error-code page describes it as a communication error between components in the electronics of the range. Samsung's NV51CB700D wall-oven service manual uses the same definition: C-F0 occurs if communication between the Main and Sub PCB is interrupted. The main board runs the heating elements and relays, and the sub board handles the display and controls, so when the link between them drops the oven can't run normally. C-F0 is a different code from C-F2, which Samsung uses for a lost link between the touch panel and the main or sub board, and from C-F1, which Samsung says only occurs during an EEPROM read or write. Samsung notes that codes can vary by model, so check your manual if your oven's display doesn't match.

Likely causes

Safe DIY checks

⚠ Before you start

Unplug the appliance or switch off its breaker before opening panels.

  1. Turn the oven off with its Power or Off key, wait a moment, and turn it back on. Samsung lists this as the first step for C-F0.
  2. If C-F0 comes back, switch off the oven's circuit breaker (or unplug the range) for at least 30 seconds, then restore power.
  3. If you have a Samsung induction range with a model number starting NSI6D and ending in 9100, 9300 or 9500, connect it to the SmartThings app after the power reset. If it wasn't connected before, press and hold Light for more than 3 seconds to open settings and choose Restart. Samsung says the range then updates within about 30 minutes, shows Upgrading and Completed, and restarts itself. The firmware should read DE92-04769A_24052400 or later in SmartThings.
  4. Make sure the range is on its own circuit and not plugged in through an extension cord or an adapter.
  5. If the code persists, note the full model number (on the label inside the door frame or storage drawer) and request service from Samsung. Checking the board connectors means opening the control panel or back cover with the breaker off, so leave that to a technician unless you're comfortable working on 240 V appliances.

🛠 When to call a pro

  • C-F0 returns after a 30-second power reset and, on the induction models Samsung names, after the firmware update. Samsung says to request service at that point.
  • The display or controls are dead or erratic and you can't run the oven.
  • You see scorched wiring, a melted connector or a pinched harness behind the control panel.
  • The oven is under warranty. Opening the control area yourself may affect coverage, so book through Samsung support with the model and serial number ready.

Parts that commonly fix it

Always match the part number to your exact model.

⚙

Main-to-sub board wire harness

Samsung's service manual has the technician unplug and reseat the connectors on the sub board and main boards first. Replace the harness only if it's damaged, matched to your exact model number.

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⚙

Main control board or sub control board

Only after the connectors and harness check out. Boards are model-specific, expensive and usually not returnable once installed.

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Sources

  1. Samsung UK: Check out the information codes on my oven (C-F0: no communication between the main PCB and sub PCB; restart, then 30-second power reset)
  2. Samsung New Zealand: Check out the information codes on my oven (same C-F0 meaning and reset)
  3. Samsung Singapore: Check out the information codes on a Samsung oven (same C-F0 meaning; C-F1 EEPROM and C-F2 touch IC codes)
  4. Samsung US: Samsung range or wall oven error codes (C-F0 electronics communication error; SmartThings firmware update for NSI6D*9100/9300/9500 induction ranges, firmware DE92-04769A_24052400 or later)
  5. Samsung NV51CB700D12AA service manual, Failure Display Codes (C-F0: Main and Sub PCB communication interrupted), via ManualsLib
  6. Samsung NV51K7770D series wall oven service manual, Failure Display Codes (C-F0: disconnect power, check connectors on the main and sub PCBs are inserted correctly), via ManualsLib

Last reviewed 2026-10-25. Always confirm against the manual for your exact model number.