Refrigerator Making Noise — What Each Sound Means
Refrigerators make a range of sounds, and most are normal. But certain noises point to a fan, compressor, or defrost issue. Here is how to tell normal from a problem.
Normal Sounds
Humming (the compressor running), occasional popping or cracking (parts expanding/contracting with temperature), gurgling or boiling (refrigerant moving), and periodic clicks (the defrost timer or the ice maker cycling) are all normal. Newer fridges also make a low whoosh from the evaporator fan.
Loud Buzzing or Rattling
A loud buzz is often the ice maker trying to fill when the water line is off (turn off the ice maker if not connected to water), or a rattle from the drain pan, loose items on top, or the fridge not being level. Check those simple things first.
Grinding or Squealing Fan
A grinding, squealing, or chirping noise that changes when you open the freezer door usually means the evaporator fan motor is failing or iced over. A similar noise from the back-bottom can be the condenser fan hitting dust/debris. Both are common, fixable causes.
Loud Knocking or Clicking From the Compressor
A loud knock or a click-then-hum-then-silence from the compressor area can mean a failing start relay or a struggling compressor. If the fridge is also warming up, this needs attention. A clicking relay is an inexpensive part; a failed compressor is a major repair.
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FAQ
A steady hum is the normal compressor. A loud buzz is often the ice maker filling with the water off, or a rattle from an unlevel fridge or the drain pan. A grinding hum points to a fan motor.
Occasional clicks are normal (defrost timer, ice maker). But a repeated click-hum-silence from the compressor can be a failing start relay — especially if the fridge is also warming.
Sources
Documents this guide was checked against. How we verify.
Always unplug an appliance and shut off its water supply before servicing. This guide is informational and not a substitute for a qualified technician.