How to Fix a Frost-Free Freezer Icing Up

Overview

A frost-free freezer that is icing up has a defrost problem. This guide covers diagnosing and fixing the issue.

Step-by-Step Fix

1. Always start by unplugging the freezer from the mains electricity socket to prevent electric shock. Completely empty the freezer of all food items and store them in a cool box or with friends to prevent spoilage while you work.
2. Locate the defrost timer, often found behind the kickplate or near the compressor, and manually advance it by turning the dial clockwise until you hear a click. Wait approximately 30 minutes to an hour; if the compressor doesn't restart and the heater doesn't activate (indicated by a slight warming or hum), the timer may be faulty.
3. With the freezer still unplugged, carefully locate the defrost heater, usually at the bottom of the evaporator coils, and disconnect its wires. Use a multimeter set to ohms to test for continuity across the heater's terminals; if the reading is infinite or 'OL', the heater coil is broken and needs replacing.
4. Identify the defrost thermostat, typically clipped to the evaporator coil, and disconnect it from the circuit. Place the thermostat in a bowl of ice water for a few minutes to cool it down, then use your multimeter on the continuity setting to check if the circuit closes (you should get a reading close to zero ohms or hear a beep).
5. Once you have identified the faulty component (timer, heater, or thermostat), order the correct replacement part specifically designed for your freezer model. Carefully install the new part, ensuring all wires are securely reconnected and positioned correctly, then reassemble any panels you removed.
6. After replacing the faulty part, plug the freezer back into the mains and monitor its operation over the next 24-48 hours. Pay close attention to whether the compressor cycles on and off correctly and if any new ice build-up occurs, which would indicate a remaining issue.

Common Symptoms & Diagnostic Resolutions

Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.

Frequently Asked Questions