Refrigerator Making Noise? Here's What Each Sound Means

A little hum is normal — every fridge makes some noise as the compressor cycles on and off. But certain sounds are early warning signs worth paying attention to. Here's a quick guide to what you're likely hearing, and whether it's something to worry about.

A Soft, Steady Hum

What it usually means: Completely normal. This is the compressor and fan doing their job. As long as it's not unusually loud or constant without ever switching off, there's nothing to worry about here.

Clicking Sounds

What it usually means: A single click when the compressor starts or stops is normal — that's the relay switching. Repeated, rapid clicking without the compressor actually starting up can point to a failing start relay or capacitor, which is worth getting checked before it leaves the compressor struggling to start at all.

Buzzing or Vibrating

What it usually means: Often it's simply that the fridge isn't sitting level, causing it to vibrate against the wall or floor — an easy fix with the adjustable feet. Persistent buzzing from the back, however, can mean the condenser fan motor is struggling or a compressor mount has come loose.

Gurgling or Hissing

What it usually means: This is actually one of the most normal-sounding "weird" noises — it's refrigerant moving through the coils after a cooling cycle. It's only a concern if it's paired with the fridge not cooling properly, which could point to a low refrigerant level.

Loud Banging or Knocking

What it usually means: This is one to act on. It can mean a fan blade is hitting ice build-up or an obstruction, or that an internal component has come loose. Continuing to run the fridge with a persistent banging noise risks more expensive damage down the line.

High-Pitched Squealing

What it usually means: Usually points to the evaporator fan motor or condenser fan motor bearings wearing out. It's not an emergency, but it tends to get louder over time, so it's worth scheduling a check before it fails completely (which usually means warmer temperatures inside).

When to Stop Waiting and Call Someone

If a new noise is loud, sudden, or paired with the fridge running warmer than usual, it's better to get a technician to look at it than to wait and see — a small fan or relay issue today can turn into a full compressor problem in a few weeks if ignored.