A refrigerator that is noisy or loud could be caused by a problem with the one or more parts. Here’s how to troubleshoot.
Condensor or Evaporator Fan Blade
A buzzing sound could be cause by a fan blade hitting ice or another object when in operation. Both the evaporator fan – located in the freezer portion of the refrigerator and the condenser fan – located underneath or behind the refrigerator – have blades, so listen for where the sound is emanating from in order to trouble shoot it.
If the sound is emanating from the freezer and the evaporator fan, it might be due to excessive ice buildup in the freezer. Unplugging and thawing the ice with a hair dryer might help the situation temporarily. However, if the noise returns due to ice build-up, then you might have to figure out why ice is building up in the freezer and fix the problem.
If there is no ice build-up, then the fan blade might be broken and will need to be replaced.
For the condenser fan blade, it might be hitting an object or it could be covered with dust or dirt. These are both easy fixes – simply move the object in its path and clean the fan blade. However, the fan blade could be damaged and in that case, it will need to be replaced.
Condensor or Evaporator Fan Motor
A defective fan motor can also cause noise when in use. If the noise is coming from the freezer portion of the refrigerator, it is most likely the evaporator motor that needs replacement. A noise coming from behind or underneath the refrigerator mean the condensor fan motor needs replacement.
Water Inlet Valve
A screeching or squealing noise can be caused by a defective water inlet valve when it is filling the ice maker tray. Replace the defective water inlet valve in order to solve the problem.