7 Preventive Maintenance Tips for Your Laboratory Refrigerator

Laboratory refrigerators in medical facilities and research centers are designed for the reliable, long-term storage of temperature-sensitive samples. As with any essential laboratory equipment, failure to follow best maintenance practices could lead to suboptimal performance. This could be detrimental to the laboratory refrigerator itself, as well as to your valuable sample material.

The top priority for maintaining the high-quality standards for laboratory refrigeration equipment is to implement a self-documenting, automated temperature monitoring system.

Maintaining the integrity of vaccines, medications, tissues, plasma, and blood samples depends on monitoring. But a robust monitoring system alone is not enough. To maximize the effectiveness of medical refrigerators, the units must function properly and be properly maintained.

How can you keep the appliance clean, improve its efficiency, and extend its lifespan?

1. Pay attention to the alarms

Laboratory refrigerators are equipped with alarms that indicate low or high temperatures, prolonged door openings, and power failures. Although it is possible to mute all of these alerts, you should not ignore them. Instead, you should check them routinely as part of your maintenance and cleaning schedule. In addition, each refrigerator must be labeled with all technical details.

2. Store all materials properly

Your laboratory refrigerator can perform at its best as long as the airflow inside it remains unobstructed. Using shelving systems not only ensures optimal use of available storage space but also helps guarantee proper airflow.

In addition, these systems make it even easier to locate samples and allow containers and boxes to be stacked neatly. This minimizes the amount of time the refrigerator door remains open.

You should also avoid storing materials on top of your laboratory refrigerator, especially if it is a top-vented unit. This could trap hot air inside the unit, forcing the compressor to run longer to maintain the proper storage temperature. By avoiding this, you can reduce energy costs and extend the compressor’s service life.

3. Keep the door seals clean

The gasket is typically designed to create an airtight seal along the entire edge of the refrigerator door. It prevents cold air from escaping the compartments and hot air from entering. In particular, ultra-low-temperature refrigerators come standard with exterior door gaskets. However, your unit may also have them on the interior doors. This helps maintain uniform temperatures inside the unit’s internal components.

Make sure all the door seals are leak-free; leaks can be easily detected by ice buildup at weak spots. In addition, you should clean them with a soft cloth to remove any dirt or dust that could compromise their overall performance. This way, you can easily avoid the problems caused by a faulty seal.

4. Regularly remove any accumulated ice or frost

Opening the refrigerator door repeatedly to remove or store items can cause ice or frost to build up. As a result, this can restrict the movement of the outer door and prevent it from sealing properly. Therefore, we recommend that you periodically inspect the door gaskets and seals for frost buildup.

To keep ice buildup to a minimum, always try to place samples in and remove them from the unit as quickly as possible. In addition, you can regularly scrape away ice that has accumulated on the door seals and make sure that ice does not build up on the interior doors. If you need to remove old inventory and materials from inside the unit, you can take this opportunity to defrost the entire unit. But always remember not to use the defrost probe when defrosting.

5. Coil Maintenance

Another crucial maintenance practice is vacuuming the condenser coils located on the exterior. But how do you determine the right time to do this? The best time is probably now. The coils must be kept clean at all times, free of accumulated dust or any other material that could hinder the intended heat exchange.

Many coils look dirty, and this may be because most people don't know that they should clean them as well.

When it comes to cooling, one important step is to keep the coil clean to ensure that your cooling unit operates as intended. Coils that are prone to dirt and dust can lead to higher energy costs and a shorter service life for the unit. Therefore, making the extra effort to clean them could go a long way toward meeting your lab’s cooling needs—both now and in the long term.

6. Clean as you go

Cleaning can also extend the life of your lab refrigerator. As you work your way from shelf to shelf, taking inventory and discarding what’s no longer needed, be sure to keep a cleaning cloth or towel handy to wipe down all the shelves. Do the same for the shelves and walls of the refrigerator.

It's best to dampen the cloth with warm water to remove crumbs and clean up spills from the walls and shelves. In addition, an all-purpose cleaner could make things easier and take care of spills and sticky stains without much effort.

7. Extend the life of your unit

If reading this article makes you feel like you haven't done much to take care of your lab refrigerator, don't worry. All you need to do now is establish a maintenance strategy that incorporates upkeep, space management, and sample management. You can also hire a service provider if you don’t have enough time for all these maintenance tasks. That way, you can be sure that your equipment is properly maintained and will continue to function for longer.

Laboratory refrigerators contain expensive reagents, irreplaceable samples, and several months or years of research. Therefore, you should treat them with the respect they deserve and follow simple preventive maintenance practices. By doing so, you can be sure that these crucial pieces of laboratory equipment will serve you reliably for years to come.