Freezer cold but refrigerator warm; ice buildup on back wall of freezer.

Safety first: Unplug the refrigerator before defrosting or testing components.

Step 1: Manually defrost

• Remove freezer contents and rear panel.
• Use towels to catch water and allow ice to melt naturally or use a hair dryer on low, keeping it moving.

Step 2: Test defrost thermostat

• With the thermostat cold, disconnect and test for continuity. Replace if open.

Step 3: Test defrost heater

• Disconnect heater leads and measure resistance. Replace if open.

Step 4: Check wiring and control

• Inspect connectors for burning or looseness.
• If heater and thermostat are good, the main control board may not be initiating defrost and may need replacement.

When to call a technician: If you are not comfortable testing electrical components, contact a professional.