A refrigerator is created to operate quietly, producing only a low humming sound. However, if your fridge starts making loud noises, it could be a sign of an issue that needs attention. Below are common causes of refrigerator noise, along with descriptions of each problem, and how to fix it.
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Main Issues When Fridge Is Noisy
Description and Troubleshooting of Problems
Refrigerator Is Not Level
A refrigerator needs to be level for optimal and quiet performance. If it is not properly balanced, the internal components, such as the compressor and fans, can vibrate excessively, creating unusual noises. Fridge may cause a loud rattling or knocking noise. The sound is typically more noticeable when the compressor starts or stops running.
Dirty Condenser Coils
Condenser coils are located at the back or bottom of the refrigerator. These coils dissipate heat from the appliance, allowing it to cool properly. Dust and debris may accumulate on the coils, causing the compressor to work harder than usual. This can result in a loud buzzing or humming noise as the refrigerator struggles to maintain the desired temperature.
Faulty Evaporator Fan
The evaporator fan circulates cold air in the freezer. If it’s faulty, you may hear grinding, clicking, or buzzing noises, often due to worn-out motor bearings, ice buildup, or damaged fan blades.
Defrost Timer Is Broken
The defrost timer regulates the automatic defrost cycle in a refrigerator, ensuring that frost does not accumulate inside the freezer. A malfunctioning defrost timer can produce clicking or ticking noises.
Broken Compressor
The compressor is the heart of the refrigerator’s cooling system, responsible for circulating refrigerant and maintaining the desired temperature. A faulty compressor can cause loud noises. If your refrigerator is making a loud humming or clicking noise and isn’t cooling properly, the compressor may not be working correctly. Sometimes, a compressor appears to be running, but when tested with gauges, it fails to generate the necessary pressure. In other cases, the refrigerator remains at room temperature because the compressor doesn’t start at all. This could be due to a faulty thermostat, start relay, capacitor, inverter control board, or main control board.
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Repair Cost
| Condenser coil cleaning | $120 – $170 |
| Evaporator fan repairing or replacing | $245 – $430 |
| Defrost timer replacing | $250 – $380 |
| Compressor replacing | $550 – $950 |
| Compressor repairing | $370 – $480 |
The cost of refrigerator repair depends on its make, specific model, and the severity of the problem.
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12 Comments
How can you prevent ice buildup on the evaporator fan and avoid fridge noise?
To prevent ice buildup on the evaporator fan and reduce fridge noise, we recommend scheduling regular maintenance to ensure your defrost system is working properly. Our technicians can check for any issues with the fan, defrost timer, or seals that could lead to ice buildup. Keeping the fridge door seals intact and avoiding overloading the unit can also help maintain optimal airflow. If you’ve noticed frost building up in your fridge, that’s a clear sign it needs some servicing. We offer that for around $200, depending on the type of unit you’ve got.
What can I do if my refrigerator starts clicking before the technician arrives?
If your refrigerator starts clicking, first check if it’s properly plugged in and the outlet is working. Try unplugging it for about five minutes, then plug it back in to see if the noise stops. If the fridge is still clicking, open the doors and listen—if the sound is coming from the back, it could be the compressor struggling to start. You can also check if the fridge feels too hot near the bottom or back, which might mean it’s overheating. If the clicking continues, it’s best to leave it unplugged and wait for the technician
I noticed that my fridge has started humming louder than usual. I decided to turn it off, left it for a few hours, and then turned it back on. After that, it started humming much louder than before. Is this normal, or should I call a technician?
Hello, Jason! This behavior is likely a sign of malfunction. It could be related to issues with the compressor, fan, or other cooling system components. We recommend having a professional check it.
Hello! I’ve been hearing a loud clicking sound from the bottom of my Bosch fridge several times. What could this be? Can I check its functionality myself?
Hello, Megan! Clicking sounds can come from several components in the fridge, such as the defrost timer, fan, or compressor. Sometimes this is part of the normal operation when the cycle switches from cooling to defrost. However, if the sound becomes louder or constant, it could indicate a problem. You can check the fan or defrost timer yourself, but for more complex issues (like the compressor), it’s best to call a technician.
What should I do if my refrigerator is making a high-pitched whistling sound that doesn’t sound like humming or clicking?
Hi Carter! This sound in your refrigerator could indicate a refrigerant leak, blocked vents, or worn fan bearings. Unplug the fridge for safety, check for obstructions in freezer vents, and ensure proper airflow by not overloading. If the noise persists, book a professional diagnostic.
Can the noise be caused by using the wrong type of refrigerant after a previous repair?
Hello Hunter! Yes, using the wrong refrigerant can cause hissing or gurgling noises due to improper pressure or flow in the cooling system. Check the fridge’s manual for the correct refrigerant type (e.g., R134a, R600a) and compare it to repair records. A certified technician should test the system with gauges, as handling refrigerant requires expertise.