How to Check the Refrigerator Compressor？- Ningbo Ouyu Import & Export Co., Ltd

How to Check the Refrigerator Compressor？

Author: admin / 2025-08-13

The refrigerator compressor is the heart of the refrigerator, and its proper operation directly affects its cooling performance. If your refrigerator isn't cooling, makes unusual noises, or starts frequently, it's likely that the compressor is malfunctioning. Here are a few simple ways to check:

1. Check the Compressor's Appearance and Temperature

The refrigerator compressor is typically located at the bottom back of the refrigerator and is a black metal can. First, inspect the outer casing for obvious damage, dents, or signs of oil leakage. Oil stains could indicate a refrigerant leak, which is often a sign of a compressor problem.

You can also gently touch the compressor's outer casing. When operating normally, the compressor will feel warm to the touch. If it's too hot to touch, it may be overheating; if it's completely cool, it may not be starting.

2. Listen for the Compressor's Operation

A normal compressor will make a slight humming sound during startup and operation. If the refrigerator is completely silent during operation, the compressor may not be working. If it's loud or has unusual sounds, such as metal rubbing or knocking, it may be due to wear on internal parts. If the compressor makes a clicking sound and then stops, it may be a problem with the starter or thermal protector.

3. Check the Compressor's Startup

When the refrigerator temperature reaches the set point, the compressor will stop and restart as the temperature rises. Unplug the power cord, wait a few minutes, then plug it back in to see if the compressor starts. If the compressor starts and stops frequently, it may indicate a circuit problem or overload protection. Normally, it should continue running for a while after starting until the temperature reaches the set point.

Precautions

Symptoms	Common Causes	Solution
Refrigerator compressor does not start	Power supply problem, starter failure, thermal protector failure	Check the electrical outlet, replace the starter or thermal protector
Refrigerator compressor overheats	Refrigerant leak, poor heat dissipation, motor winding short circuit	Refill refrigerant, clean the back of the refrigerator, replace the refrigerator compressor
Refrigerator compressor is noisy	Loose or damaged internal parts, deterioration of the shock absorber	Tighten the screws, replace the shock absorber, replace the refrigerator compressor

Checking the compressor requires specialized knowledge and tools. If you are unfamiliar with the operation, please contact a professional repair technician. Do not disassemble the compressor yourself to avoid damage or the risk of electric shock. A professional can use a multimeter or other tool to test the compressor's resistance and current for a more accurate assessment of its condition.