The compressor is the heart of your refrigerator. When it fails, the whole unit stops cooling. Here is how to identify the problem.
Sign 1: Fridge Is Not Cold But Motor Runs
If the compressor motor runs (you can hear a steady hum from the back) but the fridge is not cooling, the compressor may have lost its ability to compress refrigerant. Internal valves can wear out over time.
Sign 2: Clicking Sound Then Silence
A click-hum-click pattern means the compressor is trying to start but cannot. The start relay or overload protector may have failed. Try replacing the start relay first ($10-25) before condemning the compressor.
Sign 3: Compressor Runs Hot and Trips on Overload
Touch the compressor dome — it should be warm but not too hot to touch. If it is scalding hot and cycles on and off every few minutes, the compressor is overheating due to internal failure.
Sign 4: Loud Buzzing or Knocking
New or unusual noises from the compressor area indicate internal mechanical wear. Knocking sounds mean the internal components are loose.
Sign 5: No Sound at All
Complete silence from the compressor area can mean a failed compressor, start relay, or overload. Test the start relay and overload first as they are cheap and easy to replace.
Repair vs Replace Decision
Compressor replacement on a refrigerator costs $300-600 including labor and refrigerant. If your fridge is over 10 years old, replacement of the entire unit is usually more cost-effective. Under 7 years, compressor replacement is worth considering.
Finding Parts
Search your refrigerator model number on PartHawk to find compressors, start relays, and overload protectors across all major suppliers with instant price comparison.