Frigidaire Refrigerator: not defrosting

Possible Causes

Defrost heater failure

How to Identify: Evaporator coils remain covered in ice and heater shows no continuity on multimeter test.

Part: Defrost heater assembly

Defrost thermostat/thermistor failure

How to Identify: Thermostat doesn’t close at low temperature; continuity test fails; defrost cycle not triggered.

Part: Defrost thermostat or sensor

Defrost control board or timer malfunction

How to Identify: Timer doesn’t advance; control board doesn’t send power to defrost components; no periodic defrost cycles.

Part: Defrost control board or defrost timer

DIY Solutions

Test and Replace Defrost Heater

Advanced 30-60 minutes

Tools Needed: multimeter, screwdriver, socket set

1. Unplug refrigerator and access the evaporator area by removing freezer rear panel.
2. Use multimeter to check continuity of defrost heater.
3. If no continuity, order replacement heater for model and install new heater.
4. Reassemble panels and restore power.

⚠️ Safety First: Disconnect power before accessing internal parts.

Test and Replace Defrost Thermostat/Sensor

Moderate 20-40 minutes

Tools Needed: multimeter, screwdriver

1. Unplug refrigerator and access thermostat near evaporator.
2. Test thermostat continuity at low temperature with multimeter.
3. If no continuity within spec, replace thermostat/sensor.
4. Reassemble and restart refrigerator.

⚠️ Safety First: Ensure correct temperature range for testing.

Check and Replace Defrost Timer/Control Board

Advanced 45-90 minutes

Tools Needed: multimeter, screwdrivers

1. Locate defrost timer/control board according to model manual.
2. Check for advancement of timer or voltage output during cycle.
3. If faulty, replace with correct part.
4. Reassemble and test operation.

⚠️ Safety First: Circuit boards require careful handling to avoid static damage.

Professional Repairs

Main Control Board Replacement

Estimated Cost: $150 - $350

Defrost System Full Diagnostic & Repair

Estimated Cost: $200 - $500

When to Call a Professional

Unable to safely access internal evaporator components

Multimeter tests inconclusive or uncertain

Control board suspected fault but DI­Y replacement unclear

Preventive Maintenance

• Inspect door gaskets: Moisture ingress and excess frost buildup
  Frequency: monthly
• Clean condenser coils: Overworking of system which can stress defrost components
  Frequency: annually

Frequently Asked Questions

Why is my Frigidaire Refrigerator not defrosting?

Common causes include defrost heater failure, defrost thermostat issues, or a malfunctioning control board.

How do I fix Frigidaire Refrigerator not defrosting myself?

You can test and replace the defrost heater, thermostat, or control board with the right tools and safety precautions.

How much does it cost to fix not defrosting?

Professional repair costs range from $150 to $350 for main control board replacement, and $200 to $500 for a full diagnostic.

When should I call a technician for not defrosting?

If DIY repairs seem complex or you are unsure, it’s best to call a technician to prevent further damage.

Can I Fix This Myself?

50%

DIY Success Rate Difficulty: Either

Common Issues Reported by Users

• Defrost heater failure (2 mentions)

User Suggested Solutions

1. Replacing the defrost heater element

   Success rate: 50.0%

Community Discussions

not defrosting the evaporator coils

Replacing the defrost heater element in the freezer has resolved the issue.

DIY View on Reddit →

Source: Reddit r/appliancerepair