Samsung Microwave Error C-21

⚡ Quick Answer: C-21 means Samsung Microwave error C-21 indicates a malfunction in the magnetron, often accompanied by unusual humming sounds and f... This is typically a DIY fix.

What Does Error C-21 Mean?

Samsung Microwave error C-21 indicates a malfunction in the magnetron, often accompanied by unusual humming sounds and failure to heat food.

Common Causes

  • Magnetron (60% likelihood)
  • High Voltage Capacitor (30% likelihood)
  • Control Board (10% likelihood)

Troubleshooting Steps

  1. Step 1: Test the Magnetron

    Use a multimeter to check the resistance of the magnetron. It should typically read between 10-30 ohms. If it reads infinite, the magnetron is faulty.

    Ensure the microwave is completely disconnected from power before testing.

  2. Step 2: Inspect the High Voltage Capacitor

    Check the capacitor for any visible signs of damage or bulging. Use a multimeter to test its capacitance. If it is out of spec, replace it.

    Discharge the capacitor before handling to avoid shock.

  3. Step 3: Examine the Control Board

    Look for burnt components or loose connections on the control board. If any are found, consider replacing the board.

    Document the wiring before disassembly for easier reassembly.

  4. Step 4: Reassemble and Test

    After replacing any faulty components, reassemble the microwave and plug it back in. Test to see if the error code persists.

    If the error remains, further diagnosis may be needed.

How to Reset

To reset the C-21 error, unplug the microwave for 10 minutes, then plug it back in. If the error persists, further diagnosis is required.

Technical Specifications

wattage 1000W
component Magnetron
resistance 10-30 ohms
part_number DE74-20019A
voltage_rating 120V AC

Frequently Asked Questions

Can I fix the C-21 error myself?

Yes, but it requires some technical skills and tools to diagnose and replace parts.

How long does it take to repair a Samsung microwave with a C-21 error?

Typically, it takes about 1-2 hours depending on the extent of the repairs needed.

What causes the C-21 error in Samsung microwaves?

The error is primarily caused by a failure in the magnetron, often due to overheating or electrical issues.

Should I replace the magnetron myself?

If you have experience with appliance repair, you can replace it, but if unsure, it's best to consult a professional.

When should I call a professional for a C-21 error?

If you are uncomfortable working with electrical components or if the issue persists after replacing the magnetron.

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