A Knocking Sound in a PLHS267ZCB4 Frigidaire Refrigerator

Ice Dropping

• If you have the icemaker on, the noise you're hearing may be the icemaker dropping ice cubes into the bin, which can sound like a knocking sound. This is the normal sound of the ice dropping and nothing to be concerned about.

Temperature Control

• A knocking sound that can be described as a snapping sound may be the result of the temperature changing in the unit. As the unit cools down for the first time, you'll hear this type of noise. You also hear it as the cold control goes on and off. The knocking is due to the contracting and expanding of the walls as it cools inside. This is a normal noise.

Defrosting

• If you're defrosting the fridge, it may make noises. Frigidaire describes the noise as a popping. If you can classify the knocking as similar to a popping and you're defrosting, this is a normal noise. This sound usually happens once the defrost cycle is complete.

Not Level

• Hold onto each side of the refrigerator and try to rock it in place. If it rocks, the unit is not level, which may be the cause of the noise. When the motor cycles, it can cause unit to vibrate or rock, creating a knocking noise. You can make the unit level by removing the toe grille and using a flat-head screwdriver to adjust the front rollers on the refrigerator. Once it's level, you should not have this sound any longer. Other types of knocking sounds should be investigated by an appliance repairperson.