The Whirlpool company has worked hard to create quiet kitchen and laundry appliances. Your Whirlpool refrigerator may normally run very quietly so that you barely notice its noise in the background. However, some refrigerators may produce a loud humming sound that may prove difficult to ignore. Do not disregard your Whirlpool refrigerator if it starts to produce a loud humming sound. The change in the refrigerator's running sound may indicate there is a problem.
Look behind the refrigerator. The coils on the back of your Whirlpool refrigerator should not be up against the wall or touching anything else. These coils can vibrate against a wall or other objects, producing a loud and annoying humming sound. Check the refrigerator for levelness, and remove anything from under the refrigerator that makes the refrigerator unlevel. Add wood shims to level the refrigerator if needed. The humming noise should stop if the refrigerator was not level.
The evaporator fan motor can be quite noisy, especially if the fan has iced over. Set your refrigerator to "Defrost" overnight, and resume its normal cooling session after 24 hours. If the humming noise has not abated, take off the evaporator cover either in the back or bottom of the freezer. Notice if the fan is vibrating against other parts, and adjust it slightly if it is. You should replace the fan if the refrigerator is still humming.
Loose pipes can also vibrate and make a humming sound. Pull the refrigerator away from the wall. Unscrew the back of the refrigerator, and examine each pipe to ensure that it is not loose and vibrating. Tighten any loose pipes, and check each pipe for leaks. You should replace any leaking pipes. After you screw on the refrigerator back, push the refrigerator back into place. The refrigerator must sit levelly on the floor so that the humming is not reproduced.
A bad condenser fan or compressor can be quite loud, producing humming and clicking sounds as it turns on and shuts off. Unplug the refrigerator. After you remove the refrigerator back, unplug the condenser fan and plug in the refrigerator again. The condenser fan is defective and needs to be replaced if the noise goes away. The compressor needs to be replaced if the humming and clicking still occurs.