Microwave Error Codes: What They Mean and How to Fix Them

If your microwave suddenly stops working and displays an error code, it’s signaling a problem that needs attention. Some issues are simple, while others involve high-voltage components that should only be handled by a professional.

At Star Appliance Repair, we offer fast, expert microwave repair services in Toronto and the GTA for all major brands.

Common Microwave Error Codes and Their Meanings

Microwave error codes vary by brand, but these are the most common ones homeowners encounter:

1. SE / 5E – Keypad or Stuck Button Error (Samsung, LG)

Meaning: One of the buttons is stuck or the control panel is malfunctioning.
Fix:
• Unplug for 3–5 minutes
• Clean the keypad
• If the code returns, the touchpad or control board may need replacement

2. F3 – Temperature Sensor Error (Whirlpool, GE)

Meaning: The temperature sensor is giving incorrect readings.
Fix:
• Reset the microwave
• Ensure the vents aren’t blocked
• Often requires sensor replacement

3. F1 – Control Board Error

Meaning: The main control board is not communicating properly.
Fix:
• Try a hard reset
• If the problem persists, the board needs repair or replacement

4. H97 / H98 / H99 – Inverter or Magnetron Error (Panasonic)

Meaning: High-voltage system malfunction.
Dangerous to repair yourself.
Fix:
• Unplug and leave it
• Requires a certified technician

5. E-21 / E-22 – Humidity or Steam Sensor Error

Meaning: The cooking sensor is not detecting moisture correctly.
Fix:
• Wipe interior and sensor area
• If error continues, sensor replacement is needed

6. dE / Door Error

Meaning: The door latch is not engaging or the door switch is faulty.
Fix:
• Clean the latch and ensure proper closing
• If the error remains, the door switch assembly may need replacement

7. PF – Power Failure

Meaning: The microwave lost power during operation.
Fix:
• Reset the breaker
• Restart the appliance
• If repeated, there may be an electrical or control board issue

What To Do When Your Microwave Shows an Error Code
1. Unplug the microwave for several minutes to reset it
2. Clean the keypad, vents, and interior sensors
3. Check the outlet and breaker
4. Never open the microwave’s internal panels
(High-voltage components are dangerous even when unplugged.)
5. Call a technician if the error returns

Professional Microwave Repair in Toronto

If your microwave isn’t heating, keeps shutting off, or shows recurring error codes, our certified technicians can diagnose and repair the issue safely and quickly.

At Star Appliance Repair, we work with all major brands, including Samsung, Panasonic, LG, Whirlpool, GE, Frigidaire, and Bosch.

Need a check-up? Call Star Appliance Repair at (647)-847-8774 today!