Every refrigerator makes noise. The trick is knowing which sounds are the machine doing its job and which are a part telling you it’s on the way out. We hear both kinds on service calls all over the Tri-Valley and the East Bay, and the difference is usually easy to pick out once you know what to listen for. This applies to any mainstream brand: Whirlpool, LG, Samsung, GE, Frigidaire, Kenmore, all of them.
The sounds that are completely normal
Start here, because half the noise complaints we get on the phone turn out to be a healthy fridge.
A click when the fridge starts or stops cooling is the compressor relay switching on and off. One clean click at the start of a cooling cycle, one at the end. Gurgling or trickling after the compressor stops is refrigerant equalizing through the lines, and newer fridges with smaller, quieter compressors make that more noticeable, not less. A light hiss during defrost is normal too. That’s water hitting the heater.
Creaks, pops, and cracks come from plastic and metal expanding and contracting as the interior cycles between cooling and defrost. An occasional pop from the walls or liner, especially on a newer unit, is the cabinet flexing. And a low, steady hum is just the compressor running. If it’s even, low, and roughly the volume it’s always been, that’s the sound of a working fridge.
None of those need a technician. The next group does, or at least needs a look.
Loud buzzing or grinding from the back, near the floor
Behind the lower rear panel sit the compressor and the condenser fan. When the noise from back there turns from a hum into a buzz, rattle, or grind, the condenser fan is the usual suspect. Its blades collect dust and pet hair, the buildup throws the blade off balance, and eventually the motor bearings start to complain.
This one has a real DIY step. Unplug the fridge, pull it out, take off the lower rear access panel, and look at the fan. If the blades are furred over, clean them with a brush or vacuum and clear the coils while you’re in there. If the noise comes back clean, or the fan wobbles on its shaft, the motor is failing.
Don’t sit on a failing condenser fan. It’s the part that sheds the fridge’s heat, and when it stops, the fridge stops cooling. If yours has already reached that stage, our post on why a refrigerator stops cooling walks through what happens next.
If the grind is coming from the compressor itself rather than the fan, that’s a different conversation.
Knocking or clunking when the fridge shuts off
A compressor that knocks, thuds, or shudders at shutdown is telling you its internal mounts are wearing. This isn’t an emergency. Some compressors knock for years before anything else goes wrong. But it’s a sign of age, and it’s the right moment to get a diagnostic so you have a repair-vs-replace number before the thing decides for you, usually in August with a full fridge.
A compressor that has gotten noticeably louder overall belongs in the same category. Have it looked at on your schedule, not the fridge’s.
Chirping, squealing, or scraping from inside the freezer
That’s the evaporator fan, mounted behind the freezer’s back panel. It pushes cold air through the freezer and up to the fridge section. When it chirps or squeals, either the motor bearings are drying out or the blade is scraping on something.
Very often the something is ice. And ice on the evaporator fan shaft is the important clue, because a healthy fridge melts that frost off every few hours during its defrost cycle. Ice thick enough to reach the fan means the defrost heater, sensor, or control has a fault. You can hear the early version of this too: a fan that gets quieter and more muffled over days as frost closes in around it, sometimes with a rhythmic tick as blades clip the ice.
Either way, this isn’t a cleaning job. A defrost fault left alone ends with a frosted-solid coil and a warm fridge, the same failure chain we cover in the not-cooling guide. A useful check: on most models the evaporator fan stops when you open the door, so if the noise cuts out when you open the freezer, you’ve found your part.
Clicking over and over, and the fridge won’t run
This is the one sound that means stop and call today. A click, a few seconds or minutes of silence, then another click, repeating, with the compressor never settling into its hum: that’s the start relay failing. The relay tries to kick the compressor on, can’t, and the overload protector clicks it back off. Meanwhile nothing is cooling.
Here’s the good news: the start relay is a small plug-on part, and replacing it is one of the most common and least expensive repairs we do. The bad news only shows up if you wait, because repeated failed hot starts stress the compressor, and a cooked compressor turns a cheap fix into a big decision. We wrote up this exact symptom in more detail in Fridge Clicking but Not Cooling.
Rattling or vibrating that comes and goes
The easiest fix on this list. A fridge that buzzes against the floor, rattles the wall, or hums louder at certain times is usually just poorly seated. Check three things: the leveling feet (the fridge should sit solid, with no rock when you push a corner), clearance to the wall and cabinets, and the tubing at the back, since a water line or refrigerant tube resting against the cabinet turns the whole back panel into a speaker. Adjust the feet, pull the unit forward an inch, gently bend a touching tube clear. Done.
Things stored on top of the fridge rattle too. Yes, we’ve driven out for a bottle of olive oil.
When to call
Call for grinding or loud buzzing that survives a fan cleaning, any chirping or scraping from the freezer, knocking at shutdown, and especially the click-click-no-start pattern. Those are motors, relays, and defrost parts, and each one leads to lost cooling if it’s ignored.
Bay Area Appliance Repair Service covers the Tri-Valley and the East Bay, usually same or next-day. We’re licensed (CSLB #1136642), EPA-certified for sealed-system work, and A+ with the BBB. The diagnostic is $99, credited toward the repair, and you get the price in writing before any work starts. See our refrigeration repair service for the full rundown.
Fridge making a noise you don’t like? Call (925) 999-4095 or email welcome@adriumservice.com.
FAQ
Which refrigerator noises are normal? Clicks at the start and end of a cooling cycle, gurgling refrigerant after the compressor stops, occasional creaks and pops from the cabinet, and a low steady compressor hum. All routine.
Why does my fridge click but not start? A failing compressor start relay. The relay tries, fails, and the overload clicks it off, over and over. The fridge isn’t cooling while this happens. It’s a cheap part, so call before the compressor takes the damage.
What’s the buzzing from the back of my fridge? Usually the condenser fan, clogged with dust and pet hair. Unplug the fridge and clean the blades. If the noise survives a cleaning, the motor is failing and needs replacement before cooling suffers.
Why does the noise stop when I open the freezer door? Because most models shut the evaporator fan off when the door opens. If your squeal or chirp cuts out with the door, that fan is your culprit, and ice on it points to a defrost fault.