Home > Keeping your cool > Get To Know Your Walk-In Cooler: The Major Components

Do you own a restaurant or sandwich shop with a walk-in cooler? To keep it in tip-top shape, brushing up on your knowledge of the coolers will make it easier to spot potential problems. If you’re scheduling routine maintenance appointments, your commercial refrigeration technician knows the intricacies of your system and how to spot early signs of wear or other problems, so you’re less likely to run into unexpected breakdowns. However, problems can occur at any time. Keeping an eye on your system serves as a good safety net to your regular maintenance.

So let’s learn a little about your walk-in cooler…

The Major Components of your Walk-In Cooler


You will find an evaporator in every walk-in cooler because this is the component which freezes the moisture in the air, forming a protective barrier for the heat transfer. You should check the evaporator for ice build up. If it does accumulate on the coils, the defrost cycle will melt it and drain it from the system. If you notice the ice is not melting, this could indicate a problem with your walk-in cooler’s evaporator.


The job of the condenser is removing heat from the cooler unit, which is how it maintains a cool temperature to preserve your food. The heat it removes from the cooling unit is vented out with the aid of fans. However, when you notice a high discharge temperature in your walk-in cooler, then it could indicate your condenser coils are dirty or a fan may be damaged. Call a QRC technician as soon as you notice a difference in temperature so we can fix the problem before it becomes worse.


The compressor in your walk-in cooler works with other components to add pressure to the refrigerant in the cooling unit, which absorbs heat and cools the air. Then it evaporates the refrigerant into a gas which flows right back into the compressor. It’s a vital component to your walk-in cooler. While you can’t scan the electrical systems, like a qualified QRC technician will, you can keep an eye out for a drop in temperature where you system is no longer cooling. This can indicate a problem with your compressor like a relay trip or a malfunction.

If you notice any problems with these major components of your walk-in cooler, call a QRC technician immediately so they fix the problem before it ruins your entire system.