Samsung Microwave C20 error code
Microwave
Samsung microwave error code C20 means: Temperature sensor error — the sensor is open or shorted. Some displays show this as C-20. This guide covers how to reset the code, the most common causes, step-by-step troubleshooting, and replacement parts that typically resolve C20.
Safe to keep using?
Stop using
No immediate safety hazard detected, but monitor during use.
- • Unplug the appliance before inspection.
- • Microwave high-voltage components can retain lethal charge even when unplugged.
- • Do not continue using the appliance until the cause is identified.
1 product recall may apply
Brand-level matches — verify your model.
Show
1 product recall may apply
Brand-level matches — verify your model.
- Notice
Samsung Over-the-Range Microwaves Recalled Due to Shock Hazard
Nov 2009 · Confirm your model
Likely causes
Many codes resolve with cleaning, resetting, or reconnecting.
Check: Power-cycle the appliance and check for obvious blockages or loose connections.
Est. cost: $0–$0
Wear or electrical failure of an internal part.
Check: If basic checks fail, the faulty component likely needs replacement.
Est. cost: $0–$100
What it means
Temperature sensor error — the sensor is open or shorted.
How to fix it
- Unplug the microwave and wait at least 5 minutes — high-voltage components can hold a lethal charge even when unplugged.
- Reset Samsung C20: leave power off for 5 minutes, restore power, then restart. Confirm whether C20 returns.
- Check the most common cause for C20: Temperature sensor error — the sensor is open or shorted.
- Inspect the control pad for stuck keys, damaged membrane switches, and loose ribbon cable connections.
- If a reset and basic checks don't clear the code, use our lookup tool for AI-powered diagnosis or contact a qualified technician.
- Reassemble, restore power, and run a test cycle. If C20 returns, the faulty component likely needs replacement.
Call a pro when: Call a technician before opening the cabinet — microwave high-voltage parts can retain a lethal charge even when unplugged. Also call if you smell burning, see sparking, or the code returns after a reset.
FAQ
What does C20 error code mean on a Samsung microwave?
Temperature sensor error — the sensor is open or shorted.
What does Samsung C20 mean?
Temperature sensor error — the sensor is open or shorted.
How do I reset Samsung microwave C20?
Unplug the microwave or switch it off at the breaker for 5 minutes, then restore power and restart. A reset clears a stored C20 after a glitch, but the code will return if the underlying fault is still present.
What part do I need for Samsung C20?
Not always — some C20 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.
Can I fix Samsung error C20 myself?
Basic resets and stuck-key checks are DIY-safe. Do not open the microwave cabinet or discharge the high-voltage capacitor yourself — call a qualified technician for internal repairs.
Do I need a replacement part for C20?
Not always — some C20 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.
Samsung C20 on specific models
Other Samsung Microwave codes
Prevent this problem next time
- Follow manufacturer maintenance schedule
- Address small issues before they worsen
Sources
Manufacturer meaning
Temperature sensor error — the sensor is open or shorted.
FixApplianceCode guidance
Start with basic checks for Samsung C20 before ordering parts.
Source type: Part database
Source: ModelPartFinder + FixApplianceCode editorial
Last reviewed: 2026-08-24
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