The freezer fan blade is a component inside the freezer compartment that circulates cold air. Its function is to ensure even temperature distribution throughout the freezer. The blade is powered by a small electric motor. If this motor tries to turn but cannot due to a faulty or jammed blade, it will make repeated clicking or tapping noises as it unsuccessful attempts to start. This will result in the freezer not properly circulating cold air. Food may start to thaw and the freezer will not maintain the set temperature. Replacing the faulty or jammed freezer fan blade will stop the clicking noise and restore proper air circulation so the freezer can cool to the set temperature again.
The compressor motor compresses refrigerant and pumps it through the evaporator and condenser coils. Check compressor electrical pins with a multimeter for continuity. An open circuit indicates a faulty compressor requiring replacement by a technician. If the compressor tests okay, check the start relay and run capacitor as defects in these components prevent compressor operation. The start relay supplies power to start the motor and the run capacitor helps maintain smooth ongoing operation. Replacing defective parts ensures the compressor circulates refrigerant so the freezer can cool properly. Only an EPA-certified tech should replace the compressor.
The start relay supplies power to the compressor. A malfunctioning start relay can lead to intermittent operation or complete failure of the compressor. Without the compressor running, the freezer cannot cool down. To check if the start relay is faulty, unplug the freezer and take out the start relay from the compressor. Use a multimeter to check if there is continuity between the start and run terminals on the relay. If there is no continuity or the relay smells burned, it needs to be replaced.
The freezer control board is the main electronic control center that regulates all of the electrical components in the freezer. It receives temperature input from the thermistor sensor and activates the compressor and evaporator fan accordingly to maintain the target freezer temperature. If the control board is malfunctioning, it may fail to properly activate the compressor and evaporator fan even when the thermistor sensor is indicating the freezer temperature is too warm. Without adequate compressor run times and evaporator fan circulation, the refrigerant system will not function properly to remove heat from the freezer compartment.
If a freezer is not working properly but makes clicking noises, first verify power is reaching the compressor. No power or intermittent power to the compressor indicates a potentially faulty main control board. However, control boards are often misdiagnosed. Prior to replacement, first check more commonly defective parts. After confirming other components are functioning, replace the main control board if needed.
If a freezer is not working properly but makes clicking noises, first inspect the power cord for damage preventing sufficient voltage supply. Burnt cord terminals indicate the need to replace the damaged cord. This will restore uninterrupted voltage so the freezer can operate again.
Burnt, loose power cord prongs indicate a faulty connection to the wall outlet. Both the cord and outlet need replacing - the outlet by a licensed electrician. If multimeter readings show voltage drops below 105v when the compressor starts, contact the electric utility. Low voltage during compressor startup can lead to difficulty starting the compressor and potentially burning out the compressor windings. Replacing defective cords, outlets, and maintaining adequate voltage prevent compressor damage so the freezer can function properly.