Master-Bilt® Refrigeration News & Product Information


Walk-In Cooler And Freezer Troubleshooting

Walk-in coolers and freezers can encounter problems that affect their performance. Understanding and troubleshooting these issues is critical to maintaining your walk-in’s efficiency and functionality.

This guide will teach you how to diagnose common walk-in cooler and freezer issues and keep your walk-in running efficiently. While it’s stressful when your cooler or freezer isn’t working, we're here to help you solve your cooling issues and keep your business operating smoothly. Let's get started!

Common Walk-in Cooler and Freezer Issues

Walk-in coolers and freezers are critical to foodservice and food retail businesses, allowing for proper storage and preservation of food items. Like any other piece of equipment, walk-in coolers and freezers can encounter problems that affect their performance. Understanding and troubleshooting these issues is critical to maintaining your walk-in’s efficiency and functionality.

Issues like fluctuating walk-in temperatures, frost buildup, compressor failure, and inadequate cooling are common problems with walk-in coolers and freezers. These problems can lead to food spoilage, which can lead to significant financial losses. Being aware of and addressing these common issues can help you avoid such losses.

Signs of issues include:

  • Inconsistent temperature readings
  • Unusual noises
  • Water leakage
  • A sudden spike in energy use

Unusual noises like squealing, grinding or rattling could indicate a broken fan, damaged motor, or issues with the compressor. These noises often signify mechanical problems that require prompt attention to prevent further damage.

Water leakage inside the walk-in could indicate a blocked drain line or a malfunctioning defrost system. Accumulated water can lead to ice buildup and prevent proper cooling, potentially causing system failure.

A sudden increase in energy consumption can signal various issues, such as inefficient cooling due to dirty coils, failing compressors, or thermostat malfunctions. Monitoring energy usage patterns can help detect underlying problems affecting the walk-in's performance.

Attention to these signs is crucial as it can help you catch underlying issues requiring immediate attention. By swiftly identifying and addressing these problems, you significantly lower the risk of extensive damage and costly repairs, not to mention potential food spoilage and financial losses.

Regular maintenance, such as cleaning coils, checking door seals, and monitoring temperature settings, can help prevent many issues and avoid repair costs for your walk-in cooler or freezer. However, if problems persist, we recommend consulting a service provider specializing in walk-in cooler repairs and troubleshooting. They have the expertise to diagnose and resolve complicated issues efficiently and effectively.

Regular maintenance, such as cleaning coils, can help prevent many walk-in cooler issues.

Regular maintenance, such as cleaning coils, can help prevent many walk-in cooler issues.

Troubleshooting a Warm Walk-in Cooler or Freezer

According to Food Safety News1, more than 85 percent of food safety and product loss is due, at least in part, to walk-in cooler or freezer temperature issues.

A walk-in that’s running warm is a major concern, as higher temps can lead to food spoilage and potential financial losses. If you're facing this problem, there are several possible causes you should consider.

Thermostat Problems

If your walk-in is equipped with a mechanical thermostat vs. an electronic controller system (see below for more information), the thermostat could be malfunctioning.

The thermostat controls the temperature inside the walk-in, so if it's not working correctly, the cooler or freezer may run warmer than desired. To check the thermostat, turn it to the lowest setting and listen for a click. If you hear it, the thermostat is working. If there's no click, the thermostat may need replacement.

Defrost Cycle Issues

Another potential cause is a problem with the defrost cycle. The defrost cycle removes ice buildup from the evaporator coils. Still, ice can accumulate and hinder the cooling process if it's not working correctly. To troubleshoot defrost cycle issues, check your defrost timer, defrost heater, and defrost thermostat for signs of damage or malfunction. If you are unsure about how to find or check the defrost components, call a service technician.

By investigating these potential causes and conducting the necessary checks, you can troubleshoot and resolve the issue of a warm walk-in cooler or freezer. However, if the problem persists or you need help to identify the issue, contact a service professional to ensure the proper functioning of your walk-in.

Electronic Controllers For Walk-in Coolers and Freezers

Electronic controller systems for walk-ins help reduce and even avoid temperature and defrost issues. Many refrigeration systems include electronic controllers as a standard feature, and they can be retrofitted in some cases. These controllers are more precise, reliable and energy efficient than an all-mechanical system.

Controllers provide error codes and online data so operators and service techs know instantly if the refrigeration system is having an issue. There’s also no need for a service tech to climb onto a roof or enter the walk-in to monitor or adjust the refrigeration system.

Electronic controllers also feature more efficient defrost methods than all-mechanical systems. For example, demand defrost only initiates a defrost as needed, saving operators up to 27% on their energy usage. Other features like reverse cycle defrost create additional energy savings.

LogiTemp™ controller on Split-Pak™ refrigeration system

Keeping Your Walk-in Running Smoothly

Regular cleaning and maintenance are crucial for ensuring your walk-in freezer's efficient and trouble-free operation.

Component replacement is expensive and can frequently be avoided by simple maintenance. For example, replacing a refrigeration system compressor ranges from $200 to over $700, not including labor2. However, routine cleaning procedures can avoid that cost altogether.

By following these routines, you can minimize the risk of common problems and extend the lifespan of your equipment.

Maintenance Tips

  • Clean the interior and exterior of the walk-in on a regular basis with mild detergent and warm water. Avoid abrasive cleaners or sharp tools that can damage the surface.
  • Inspect the door seals regularly for cracks or gaps. Damaged seals can cause temperature fluctuations and increased energy use.
  • Remove dust and debris from condenser coils. Blocked coils can hinder proper heat exchange and overwork the compressor.
  • Check evaporator and condenser fan blades for signs of damage or wear. Replace any damaged blades promptly to prevent further issues.

Preventing Common Problems

  • Avoid overfilling the cooler or freezer. Overcrowding can block proper airflow and cause temperature inconsistencies.
  • Keep the walk-in well-organized to allow proper air circulation to maintain a consistent temperature throughout.
  • Regularly check the walk-in's temperature settings to ensure they're correct. Extreme temperatures can strain components and lead to malfunctions.

Regular Inspection And Maintenance Checklist

  • Check the door hinges and latches for signs of wear or misalignment. Adjust or replace them as necessary.
  • Monitor interior temperature and humidity levels with a reliable thermometer and hygrometer.
  • Inspect the power supply and electrical connections for loose or damaged wires. Repair or replace any faulty components immediately.
  • Schedule professional maintenance at regular intervals to catch potential issues before they escalate.

By following these cleaning, maintenance, and prevention tips, you can significantly reduce the likelihood of encountering cooler or freezer problems and ensure the smooth operation of your walk-in.

If you would like further information or need service assistance, please contact the RSG Technical Services team at 1-800-388-5253 or email us at rsgservice@refsg.com.

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1”Running a little hot and cold? Avoid the food safety danger zone,” www.foodsafetynews.com, August 28, 2019, https://www.foodsafetynews.com/2019/08/running-a-little-hot-and-cold-avoid-the-food-safety-danger-zone/

2” Calculating the Cost of Restaurant Equipment Failures,” https://xtrachef.com/, October 14, 2019, https://xtrachef.com/resources/calculating-the-cost-of-restaurant-equipment-failures/