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Why Refrigerator Making Buzzing Noise?

Written by Oleg Chudnovski

A refrigerator is a major home appliance that works tirelessly night and day all year round to keep your food fresh and safe. However, when it starts making unusual sounds, it might be a concern. Thus, a seemingly minor buzzing sound can indicate underlying issues that call for closer attention. Neglecting it could result in reduced efficiency, higher energy bills, or even severe damage to your fridge.

This article will delve into potential reasons for a refrigerator making a buzzing noise and explain how to detect and address them.

Identifying Normal vs. Unusual Noises of Refrigerator

Like any machine, a fridge produces sounds as a part of its regular operation. Yet, not all sounds are good ones. It’s essential to distinguish between normal and unusual fridge buzzing to maintain its efficiency and longevity, and present more complex malfunctions.

The sounds pertinent to the refrigerator’s standard operation include:

• Humming or whirring is the sound of a compressor cycling on and off to maintain the desired temperature.
• Clicking is often related to the defrost timer or the temperature control system engaging and disengaging.
• Gurgling or bubbling refers to the refrigerant flowing through the coils as it transitions between liquid and gas states to cool your fridge.
• Popping or cracking is produced when the appliance adjusts to temperature changes. Interior walls or shelves might expand and contract, causing these sounds.
• Soft fan noise is generated by a fan circulating air inside a fridge.

Anything beyond this spectrum that sounds weird might indicate a serious issue that needs fixing. If a sound occurs occasionally and at a low volume, it’s likely normal. Persistent or loud noises are typically signs of trouble.

Common Causes of Refrigerator Buzzing

Why is my refrigerator buzzing? When your fridge makes a buzzing noise, it can indicate anything from a minor inconsistency to a major malfunction. Knowing the reason, you can take prompt action and keep your fridge running smoothly. So, let’s consider the major causes, how to check them, and the signs that point to potential problems.

New refrigerator settling-in

A brand-new refrigerator may produce buzzing or humming noises as it adjusts to regular operation. This is often due to the compressor and refrigerant system settling in. Confirm that your appliance is properly leveled and observe if the noise diminishes within a few days.

Signs to watch for: Consistent buzzing from the rear or bottom of the fridge.

Misplaced drain pan

Located at the bottom of the fridge, a drain pan collects water from the defrost cycle. If it’s out of place or loose, it can vibrate and produce a buzzing sound. Reach the pan beneath the appliance by removing the bottom grille or panel and make sure it’s intact and sits in place.

Signs to watch for: Noticeable vibration near the bottom of the fridge.

Water line problems

Buzzing in models featuring a water dispenser or ice maker could result from water line issues, such as kinks, clogs, or air bubbles. Check the water line for a secure connection and test the dispenser or ice maker for proper operation.

Signs to watch for: Inconsistent water flow or no ice production.

Broken compressor

If the problem of your fridge making vibrating noise is not due to the above simple reasons, you should look for internal components’ failures. The first part to check is a compressor cycling refrigerant to maintain cool temperatures. When it malfunctions, it tends to produce loud buzzing or clicking noises. Listen for the sound coming from the back of the fridge and check the cooling function.

Signs to watch for: Persistent loud noise, warm interior even in the coldest setting.

Dirty condenser fan or coils

Dirt, dust, and debris on the condenser components can obstruct airflow, causing the fan to overwork and drone. Depending on the model, you can find a condenser fan and coils at the back or bottom of your fridge. Use a soft brush or vacuum to thoroughly clean those parts. Regular cleaning will help you prevent a noisy condenser assembly issue.

Signs to watch for: Reduced cooling efficiency or overheating at the back.

Evaporator fan motor issue

The evaporator fan circulates cold air inside the refrigerator. If the motor is faulty or obstructed, it can produce a squealing noise. Check for the evaporator fan (typically located in the back of the freezer) for ice or debris buildup and the gasket integrity and proper placement.

Signs to watch for: Uneven cooling or warm spots inside the fridge, loud bussing that stops when the door is open

Defrost timer and heater malfunction

Responsible for defrost cycles and melting ice from the evaporator coil, a faulty timer or heater can lead to frost buildup and cause the evaporator fan motor to buzz as it struggles to circulate air. You can manually rotate the timer knob (if accessible) to switch it between cycles and inspect the evaporator coils behind the freezer’s rear panel for frost buildup.

Signs to watch for: Loud humming noise near the freezer or evaporator fan area, uneven cooling, with some sections warmer than others, and excessive frost buildup in the freezer.

Temperature settings

If the refrigerator is set to an extremely low or high temperature, the compressor will overwork and expedite frost buildup, resulting in buzzing. The ideal temperature settings are 37°F for the fridge and 0°F for the freezer.

Signs to watch for: Loud droning when the compressor is active, heavy frost buildup or overly cold compartments.

Spark Service PRO Is Your Reliable Companion for Refrigerator Repairs

A fridge making a buzzing noise is not only annoying. It can suddenly break down, leaving you with spoiled food and entailing costly replacements. The sooner you detect the cause of the unpleasant noise, the greater your chances of averting serious malfunctions. Instead of attempting risky DIY fixes, entrust your refrigerator repair to the expert hands at Spark Service PRO.

Backed by extensive expertise, our skilled and certified technicians can quickly diagnose and repair all kinds of refrigerator issues, from strange noises to complex problems such as compressor failure or refrigerant leaks.