Evaporator icing is a common issue that can impact the efficiency of refrigeration systems, causing them to work harder and potentially fail. If you’ve noticed ice building up on your evaporator coils, it’s important to address the problem promptly to avoid costly repairs or potential downtime.
Below, All So Cool will cover the common causes of evaporator icing and provide tips on troubleshooting and solving the issue.
1. Door Left Open Too Long
One of the simplest, yet often overlooked, reasons for evaporator icing is leaving the door open too long while loading or unloading stock. This is particularly common in cold rooms or walk-in freezers, where the constant opening and closing of the door can allow warm, moist air to enter. When this air hits the cold evaporator coils, it can cause excessive condensation, which then freezes on the coils. This leads to an ice buildup that can block airflow and reduce cooling efficiency.
Solution:
To prevent this from happening, ensure that doors are closed as quickly as possible during loading or unloading. If your refrigeration system has an automatic door closer, make sure it’s working properly. Additionally, check the door seals for any wear or damage, as gaps can allow warm air to enter more easily.
2. Shortage Of Refrigerant
Another potential cause of evaporator icing is a shortage of refrigerant. When refrigerant levels drop, the evaporator coils don’t absorb enough heat, leading to lower temperatures in the system. This can cause condensation to freeze on the coils, resulting in ice buildup. This issue can be difficult for the layperson to diagnose, as it requires checking the refrigerant levels and assessing the performance of the system.
Solution:
If you suspect that a refrigerant leak or shortage is causing the issue, it’s essential to contact a professional technician – such as those at All So Cool. We will be able to check the refrigerant levels, detect any leaks, and recharge the system as needed. Regular maintenance and servicing of the refrigeration unit can help prevent this issue from occurring.
3. Blocked Drain
The drainage system in your refrigeration unit plays a crucial role in removing excess water from the evaporator tray. If the drain becomes blocked, water can pool in the tray, freeze on the evaporator coils, and cause an ice buildup. In some cases, the blockage might not be immediately obvious, but it can lead to significant issues over time if not addressed.
Solution:
Regularly inspect the drain to ensure that it’s clear and running freely. If you notice any signs of blockage, clear it as soon as possible to prevent water from accumulating in the evaporator tray. Using a mild cleaning solution or descaling agent can help keep the drain system clear and free from debris. It’s also worth checking for any ice that may have formed around the drain during defrost cycles.
4. Ineffective Defrost Settings
Defrost cycles are essential in preventing ice buildup on the evaporator coils. If the defrost settings are not appropriate for your usage case, the system may not be clearing away the ice buildup efficiently, leading to frozen coils. This issue can arise if the defrost cycle is set too infrequently or at the wrong times, causing excess ice to accumulate over time.
Solution:
Check the defrost settings on your refrigeration system and ensure they are aligned with your usage requirements. For example, if the unit is used frequently or has high humidity levels, more frequent defrost cycles may be necessary. If you’re unsure about the appropriate settings for your system, consult the manufacturer’s manual or a refrigeration professional for guidance.
Keep Your Cool: Preventing Evaporator Icing For Optimal Performance
Evaporator icing can be caused by a variety of factors, ranging from simple issues like an open door to more complex problems like refrigerant shortages. By regularly checking for common issues such as door seals, refrigerant levels, drain blockages, and defrost settings, you can help maintain the efficiency of your refrigeration system and prevent ice buildup on the evaporator coils.
If you’re unable to resolve the issue on your own, or if the ice buildup persists, contact the professionals at All So Cool for assistance. Timely troubleshooting and repairs will help ensure that your refrigeration system continues to operate smoothly, saving you both time and money in the long run.
At All So Cool, we pride ourselves on high quality service, repair, installation, cleaning and maintenance of beverage, ice and refrigeration equipment. Having your refrigeration plant serviced by All So Cool at regular intervals will prevent the chance of a system breakdown.
Chat to All So Cool fridge mechanics Brisbane and Gold Coast on (07) 3422 0011 to discuss how we can help keep your business running cool. We are available 24/7.