Last Updated: June 2026 | Reading Time: 7 minutes
Is your refrigerator making a loud noise that it never made before? Don’t panic — most refrigerator noises are easy to diagnose and fix yourself without calling a technician.
In this guide, we’ll explain the most common refrigerator noises, what each one means, and exactly what you should do to fix it.
Is It Normal for a Refrigerator to Make Noise?
Yes — refrigerators are never completely silent. Normal sounds include a soft hum, occasional clicking when the compressor starts or stops, and a gentle gurgling from refrigerant flowing through the coils.
The key question is: is the noise new, louder than usual, or unusual?
If yes, keep reading.
Quick Navigation
- Loud Humming or Buzzing Noise
- Clicking or Knocking Noise
- Loud Gurgling or Dripping Noise
- Squealing or Screeching Noise
- Popping or Cracking Noise
- When Should You Call a Technician?
- Final Thoughts
1. Loud Humming or Buzzing Noise
What it sounds like: A constant, loud hum or buzzing coming from the back or bottom of the fridge.
Most likely causes:
- Dirty condenser coils — When coils are clogged with dust, the compressor works harder and hums louder.
- Faulty condenser fan — The fan that cools the compressor may be hitting something or wearing out.
- Compressor issues — An aging compressor often gets louder over time.
How to fix it:
- Unplug the fridge and pull it away from the wall
- Clean the condenser coils with a vacuum or coil brush
- Check the condenser fan — remove any debris and spin the blade by hand to test it
- If the fan motor is broken, replace it (costs $20–$50 on Amazon)
Cost: $0–$50 | Time: 20–30 minutes
2. Loud Rattling Noise
What it sounds like: A rattling or vibrating sound, especially when the compressor is running.
Most likely causes:
- The fridge is not level
- Something on top of or behind the fridge is vibrating
- A loose drain pan underneath the fridge
- Loose screws or panels at the back
How to fix it:
- Check if the fridge is level — adjust the front legs until it sits firmly
- Remove anything stored on top of the fridge
- Pull the fridge out and check the drain pan — press it firmly into place
- Tighten any loose screws on the back panel
Cost: $0 | Time: 10 minutes
Tip: Place the fridge on an anti-vibration mat to reduce rattling permanently.
3. Clicking or Knocking Noise
What it sounds like: Repeated clicking, especially when the fridge turns on or off.
Most likely causes:
- Normal compressor cycling — A soft click when the compressor starts or stops is completely normal.
- Faulty start relay — If you hear rapid clicking and the fridge isn’t cooling, the start relay may be broken.
- Ice maker — Clicking from the freezer area is often the ice maker filling with water or dropping ice.
How to fix it:
- If the clicking happens once or twice and stops → normal, no action needed
- If the clicking is rapid and constant → test the start relay by removing it and shaking it. If it rattles, replace it ($10–$20)
- If the clicking is from the freezer → check the ice maker and make sure it has a water supply
Cost: $0–$20 | Time: 5–15 minutes
4. Loud Gurgling or Dripping Noise
What it sounds like: A bubbling, gurgling, or dripping sound from inside the fridge.
Most likely causes:
- Refrigerant flowing through coils — This is completely normal and nothing to worry about.
- Defrost cycle — During defrosting, melting ice drips into the drain pan and makes gurgling sounds.
- Water dispenser line — If your fridge has a water dispenser, water flowing through the line can make gurgling sounds.
How to fix it:
In most cases, gurgling and dripping sounds are completely normal. If the sound is very loud or constant, check that the drain line inside the fridge is not clogged.
Cost: $0 | Time: 0 minutes (usually no fix needed)
5. Squealing or Screeching Noise
What it sounds like: A high-pitched squeal or screech coming from the back of the fridge.
Most likely causes:
- Evaporator fan motor failing — This fan circulates cold air inside the fridge. When its bearings wear out, it makes a loud squealing noise.
- Condenser fan motor failing — Same issue with the fan at the back of the fridge.
How to fix it:
- Open the fridge and freezer doors — if the squealing gets louder, it’s likely the evaporator fan
- If the noise comes from the back, it’s the condenser fan
- Replace the faulty fan motor — costs $20–$60 on Amazon
Cost: $20–$60 | Time: 30–45 minutes
6. Popping or Cracking Noise
What it sounds like: Loud pops or cracks, especially at night or when the temperature changes.
Most likely causes:
- Thermal expansion — The plastic walls inside the fridge expand and contract as temperature changes. This creates popping sounds and is completely normal.
- Ice cracking in the freezer — Large pieces of ice can crack and pop when the temperature shifts.
How to fix it:
Popping and cracking sounds are almost always normal and harmless. If they are very frequent and accompanied by cooling problems, call a technician to check the refrigerant system.
Cost: $0 | Time: 0 minutes
Quick Reference: Refrigerator Noise Guide
| Noise Type | Likely Cause | Fix Needed? | Estimated Cost |
|---|---|---|---|
| Soft humming | Normal compressor | No | $0 |
| Loud humming | Dirty coils / bad fan | Yes | $0–$50 |
| Rattling | Not level / loose parts | Yes | $0 |
| Clicking (occasional) | Normal compressor cycling | No | $0 |
| Rapid clicking | Bad start relay | Yes | $10–$20 |
| Gurgling | Refrigerant / defrost | No | $0 |
| Squealing | Fan motor failing | Yes | $20–$60 |
| Popping / cracking | Thermal expansion | No | $0 |
When Should You Call a Technician?
Call a professional if:
- The noise is very loud and started suddenly
- The fridge is also not cooling properly
- You hear a loud bang or smell burning
- The compressor never stops running
Final Thoughts
Most refrigerator noises are either completely normal or caused by simple issues you can fix in under 30 minutes. Start by cleaning the condenser coils and checking the fans — these two fixes solve the majority of loud fridge noises.
Did this guide help you identify the noise? Leave a comment below and tell us which fix worked!
Looking for more appliance repair guides? Check out:
- Why Is My Fridge Not Cooling? (7 Causes + Easy Fixes)
- How to Fix a Leaking Refrigerator (Step-by-Step)
- Refrigerator Ice Maker Not Working – 6 Fixes to Try
Leave a Reply