The E6 error on your Frigidaire means the defrost thermistor sensor has failed or is sending a reading outside the normal range. In most cases this is a faulty sensor rather than a serious cooling failure, and it can often be checked and replaced without calling a technician.

Error code E6
Meaning Defrost thermistor sensor fault or open/shorted circuit
Severity Medium — the fridge may still run but temperature control becomes unreliable
Time to fix 20–40 minutes
Tools needed Multimeter, screwdriver

What the E6 error means

Frigidaire refrigerators use several thermistors to monitor temperatures in different parts of the appliance, including the defrost sensor near the evaporator coil. The E6 code appears when the control board detects a signal from this sensor that is either missing, shorted, or out of its expected resistance range.

When this happens, the control board can no longer accurately manage the defrost cycle, which can lead to ice buildup, warmer temperatures, or the compressor running longer than normal. Similar sensor issues are covered in the Frigidaire EF Error Code: Causes and Fixes guide if you want a comparison.

Common causes

  • Defective defrost thermistor sensor
  • Loose or corroded wiring connector at the sensor
  • Damaged wire harness from ice contact or rubbing
  • Moisture intrusion causing a short in the sensor circuit
  • Faulty main control board misreading a working sensor
  • Sensor dislodged from its mounting bracket near the evaporator coil

How to fix the E6 error

  1. Power down the fridge: Unplug the refrigerator or switch off power at the breaker for at least 5 minutes, then restart it to see if the code clears on its own.
  2. Locate the defrost thermistor: Remove the back interior panel to access the evaporator coil and find the small sensor clipped near it.
  3. Check the wiring connection: Inspect the connector for corrosion, moisture, or looseness, and reseat it firmly.
  4. Test the sensor with a multimeter: Compare the resistance reading against the manufacturer’s specification chart for the current temperature; a reading of zero or infinite ohms means it needs replacing.
  5. Replace the thermistor if faulty: Install a manufacturer-approved replacement part and reconnect the wiring securely.
  6. Reset and monitor: Power the unit back on and watch the display over the next hour to confirm the E6 code does not return.

FAQ

Can I keep using my fridge with an E6 error showing?
You can usually keep it running short-term, but the defrost cycle may not work correctly, which can cause ice buildup or temperature swings, so it’s best to address it soon.

Is the E6 error the same as other sensor codes like CA or CE?
No, each letter code points to a different sensor location. If you’re unsure, check the Frigidaire CA Error Code: Causes and Fixes and Frigidaire CE Error Code: Causes and Fixes pages to compare symptoms.

How much does a replacement thermistor cost?
Most Frigidaire defrost thermistors cost between $15 and $40, and the repair is usually simple enough for a confident DIYer to complete in under an hour.