C-30 — Main PCB Internal Sensor Error
The control board's own internal temperature/diagnostic sensor is reading out of range, indicating a hardware fault on the main PCB.
- Keep using it?
- Limited use only
- DIY difficulty
- Hard
- Checked against
- manualslib.com manufacturer manual seen via a third-party republisher, which we do not link — re-sourcing to the manufacturer is pending
How to fix it
- Power-cycle the oven at the breaker for 5 minutes.
- If the code persists, the fix is to replace the main control board — there's no field repair of the onboard sensor.
- Verify ventilation around the PCB compartment before installing a new board, and check for blocked vents (see C-31) to avoid recurrence.
- Confirm incoming line voltage is within spec before powering up the new board.
Why it happens
Typical signs: C-30 displayed and oven won't run · Code returns after power cycle · Sometimes accompanied by C-31 · No external sensor fault found
- Failed onboard sensor IC PCB-mounted thermistor or sensor IC failed.
- Heat damage to the main PCB Repeated high-temp cycles cooked nearby components.
- Surge damage Power event damaged the sensor circuit.
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 main control board Common replacementAmazon →
More Samsung oven codes
Frequently asked questions
What does the C-30 code mean on a Samsung oven?
The control board's own internal temperature/diagnostic sensor is reading out of range, indicating a hardware fault on the main PCB.
What causes the C-30 code on a Samsung oven?
Failed onboard sensor IC: PCB-mounted thermistor or sensor IC failed. Heat damage to the main PCB: Repeated high-temp cycles cooked nearby components. Surge damage: Power event damaged the sensor circuit.
Is it safe to keep using a Samsung oven with a C-30 error?
Limited use only. This is rated a serious-severity fault.
How do I fix C-30 on a Samsung oven?
Power-cycle the oven at the breaker for 5 minutes. If the code persists, the fix is to replace the main control board — there's no field repair of the onboard sensor. Verify ventilation around the PCB compartment before installing a new board, and check for blocked vents (see C-31) to avoid recurrence.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. How we verify: manualslib.com — manufacturer manual seen via a third-party republisher, which we do not link — re-sourcing to the manufacturer is pending.