Why Is My Fridge So Loud?

Compressor and Condenser Fan Noises

• The compressor is the operating unit of the refrigerator. It includes a motor and pump and normally makes a soft humming noise. If it gets noticeably louder, it may indicate a problem with the motor -- an expensive issue that needs professional repair. The condenser fan, which is located on the back of or underneath the fridge, may also make a humming noise. If it gets loud or starts knocking, however, it may need cleaning; lint and debris often build up on these fans, interfering with their normal operation. Unplug the fridge and clean it with a vacuum hose attachment. If the compressor motor or condenser fan makes a loud but brief high-pitched sound, it is probably just the motor changing speed to raise or lower the temperatures.

Evaporator Fan and Defroster System Noises

• The evaporator fan, which circulates cool air through the refrigerator, is located in the freezer and will kick on and off as needed. This fan may squeal or moan loudly if the motor breaks down, which often happens with age. When this happens, the motor will need to be replaced. In addition, as the refrigerator goes through the cycle of cooling and warming, the walls will contract and expand, making popping and cracking noises. This happens about every seven hours in most refrigerators. Finally, the defrost timer, which controls the heater that defrosts the evaporator coils, may break down, resulting in a loud noise.

Water-Related Noises

• Refrigerators that have automatic ice makers, and ice and water dispensers make noises related to those features. Ice cubes crash and clink as they are released into the bin. The water valve, which is controlled by a timer, may buzz and click as it operates. In a related issue, the water line may thump as water moves through it.

Reducing Noises

• Refrigerator noises often sound louder because the sound waves travel along hard surfaces. These sounds can be reduced by using a soundproofing mat. Place the mat on top of the fridge and let the mat hang down on either side. This is especially effective if the fridge is tucked into an alcove. Another option is to place a vibration or soundproofing mat under the refrigerator and up the back wall. Move the refrigerator into position on top of the floor mat, and push it back against the wall. The back of the fridge will hold the mat in place against the back wall. Do not block the bottom front of the unit, as this is where the refrigerator takes in air.