Review
Part of Refrigerator and Their Functions – A Simple Guide
AAZparts Team
Updated on July 30, 2025
7 min read
Understanding each part of the refrigerator and its function helps you make smarter maintenance decisions and extends the life of your appliance. Whether you're troubleshooting a broken fridge or planning a replacement, this guide from AZParts breaks it down simply and shows you where to find genuine parts that fit.
1. What Are The Core Parts Of A Refrigerator?
Modern refrigerators may look sleek on the outside, but the real magic happens inside. There are five fundamental parts of a refrigerator that work together to keep your food fresh and cold. Let’s explore them below.
1.1. Compressor
Often referred to as the main of the refrigerator, the compressor is arguably the most critical part of the system. It serves as the driving force that initiates the entire cooling process. Specifically, the compressor compresses the refrigerant gas, increasing its pressure and temperature, then pushes it through the coils to begin the cooling cycle.
This step is crucial because it prepares the refrigerant for the heat exchange process that occurs in the next phase. Without a functioning compressor, the entire system fails which means your refrigerator won’t be able to cool at all. It’s also one of the most expensive parts to replace, so regular maintenance is key.
The compressor is the heart of the refrigerator (Source: AZParts)
1.2. Condenser Coils
Once the refrigerant has been pressurized by the compressor, it moves into the condenser coils which are typically located at the back or beneath the fridge. These coils act like a radiator, allowing the hot high-pressure gas to release its heat into the surrounding air. As the gas cools down, it transforms into a high-pressure liquid.
Clean condenser coils are essential for optimal performance. Over time, dust and dirt can accumulate on them, making it harder for the coils to release heat efficiently. This can force the compressor to work harder, increasing energy consumption and leading to potential system failure.
1.3. Expansion Device
After the refrigerant has been converted into a liquid, it passes through an expansion device, usually an expansion valve or capillary tube. This small but essential component controls the flow of refrigerant into the evaporator coils.
During this phase, the liquid refrigerant rapidly expands and undergoes a dramatic pressure drop, causing it to cool rapidly. This transformation turns the liquid into a cold low-pressure vapor that is now ready to absorb heat, a vital part of the refrigeration cycle.
The expansion device cools the refrigerant before evaporation (Source: AZParts)
1.4. Evaporator Coils
Now in vapor form, the refrigerant enters the evaporator coils which are usually located inside the fridge and freezer compartments. This is considered the coldest part of the refrigerator and for good reason. Here, the cold vapor draws heat from the food and air inside the compartments, effectively lowering the internal temperature.
As the refrigerant absorbs heat, it slowly turns back into a gas, which will eventually return to the compressor to restart the cycle. If you notice warm spots or frost buildup, the evaporator coils could be dirty, clogged, or even damaged, significantly reducing the cooling efficiency.
1.5. Thermistat
The final piece of the puzzle is the thermostat. Acting as the fridge’s temperature control brain, it constantly monitors the internal temperature and communicates with the compressor. When the temperature rises above the preset level, the thermostat signals the compressor to kick on and cool things down. Once the desired temperature is reached, it turns the compressor off to save energy.
A faulty thermostat can result in a fridge that is either too warm or too cold, leading to food spoilage or freezing. If you're experiencing inconsistent temperatures, consider checking or replacing your thermostat.
For a dependable and compatible option, the AZParts refrigerator thermostat is a smart choice. Designed to fit a wide range of refrigerator models, this part ensures precise temperature control and reliable performance, keeping your food fresh and your appliance running smoothly.
AZParts Thermostat ensures reliable cooling (Source: AZParts)
2. What Accessories and Add-On Parts Come With a Refrigerator?
While the cooling system does the heavy lifting, accessories make your refrigerator more functional, convenient, and customizable. These parts can wear out over time, but replacements are easy to find with AZParts.
- Ice Maker: Many modern refrigerators include an automatic ice maker. This small device freezes water into cubes and stores them for easy access. If yours stops working, you may need to replace components like the ice maker module, water line, or refrigerator water inlet valve.
- Crisper Drawers: Crisper drawers are designed to control humidity and keep fruits and vegetables fresh for longer. They slide in and out frequently, making them prone to cracks or misalignment. Our refrigerator door shelf and refrigerator handle cover your drawers remain supported and aligned, preventing food spills and damage.
Refrigerator Crisper Cover Support Replacement Part (Source: AZParts)
- Water Filter: Water filters purify the drinking water and ice dispensed from your fridge. Over time, they clog and reduce water quality. Replacing your filter every 6 months is recommended.
- Adjustable Shelving & Storage Trays: Shelving inside your refrigerator can be customized depending on your food storage needs. However, frequent adjustment and weight can cause the brackets, trays, or shelves to wear out.
- Temperature Management System: Advanced refrigerators come with multi-zone temperature settings, touch controls, or smart sensors. If these components fail, it can result in uneven cooling or frost buildup. These systems include small circuit boards and sensors that may need replacing if your fridge isn't performing as expected.
3. How Do I Know If I Need to Replace Refrigerator Components?
It’s not always obvious when a refrigerator part is failing. Here are signs that a part of refrigerator may need replacing:
- Unusual noises: Clicking, buzzing, or humming can indicate compressor or refrigerator fan motor issues.
- Inconsistent temperature: If food spoils quickly, the thermostat, evaporator fan, or temperature control system might be faulty.
- Water leakage: Could be a blocked defrost drain or cracked water line.
- Frost build-up: A malfunctioning defrost heater or thermostat may be to blame.
- Door not closing properly: You might need to replace hinges, gaskets, or door shelves.
Signs include noises, leaks, frost, or temperature issues (Source: AZParts)
Before replacing anything, identify your fridge model and search for matching parts at AZParts Refrigerator Collection. Using genuine components ensures compatibility and durability.
4. FAQs
4.1. What do you call the bottom of the refrigerator?
The bottom of a refrigerator typically houses the compressor, condenser coils, and drip pan. In some models, it also includes a freezer drawer or vegetable crisper. This area plays a crucial role in the cooling cycle and needs to be kept clean for optimal performance.
4.2. What parts cool the refrigerator?
The evaporator coils, compressor, expansion device, and thermostat are key parts responsible for cooling the refrigerator. Together, they form a closed-loop system that absorbs heat from inside the fridge and releases it outside.
4.3. Are parts for fridges interchangeable across brands and manufacturers?
Not always. While some parts may be universal, most components are model-specific. That’s why it’s important to verify the compatibility based on the exact model number of your appliance before purchasing a replacement.
4.4. Where can you find replacement parts for a refrigerator?
You can find reliable and high-quality replacement parts at AZParts Refrigerator Collection. From thermostats and door shelves to water filter caps and crisper drawer supports, AZParts offers solutions tailored to major brands and models. Plus, their website makes it easy to search by product type or brand.
Understanding the function of each part of the refrigerator — from compressors to crisper drawers — gives you a clearer picture of how to maintain, troubleshoot, and repair your appliance. When any part fails, having access to genuine, compatible replacements is essential. AZParts makes it simple. With an extensive inventory of OEM-quality parts, competitive prices, and a user-friendly website, you’re never far from a solution.
Learn more about other refrigerator parts' problems and how to fix them:
Contact Info
Address: 8 The Green, Ste A, Dover, Delaware 19901-3618, United States
Email: support@azparts.com
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