If your cool room or fridge isn’t keeping temperatures consistent, one common culprit is a frozen evaporator coil.
When coils freeze, airflow is restricted, the compressor has to work harder, and cooling becomes inefficient. Identifying and addressing the issue early can prevent bigger problems and costly repairs. Below, All So Cool has a breakdown.
Identifying The Problem
The easiest way to spot a frozen evaporator coil is to look for ice. Take a quick glance inside the cool room or behind any visible fridge panels, any frost or solid sheets of ice indicate a problem.
You may also notice weak or uneven airflow from the vents, constant compressor operation, unusual noises, or warm spots in your fridge or cool room. Feeling for airflow is especially important: if the air coming from the vents feels weaker than usual, it could be a sign that ice is blocking proper circulation.
Understanding The Causes
Once you’ve identified that ice is present, it’s helpful to understand why it’s forming. Restricted airflow is a common reason, often caused by dirty or blocked filters. Low refrigerant levels can also lead to freezing, as reduced pressure inside the coil drops its temperature below freezing.
Other contributing factors include malfunctioning defrost cycles, dirty coils, or excessive warm, moist air entering the system when doors are left open. Each of these issues can create the perfect conditions for ice to build up.
Fixing The Issue
If ice is present on the coil, it’s important not to chip it away, this can easily damage the coil fins or tubing. Instead, turn off the unit and allow the ice to melt naturally. Once thawed, check and clean any blocked filters, ensure fans are working correctly, and inspect doors and seals for leaks.
If the problem persists, a professional refrigeration technician can check refrigerant levels, test the defrost cycle, and inspect for hidden mechanical or electrical issues.
Preventing Future Freezing
Regular maintenance is the best way to prevent frozen evaporator coils from recurring. Keep filters clean, schedule periodic coil cleaning, and ensure that airflow isn’t obstructed. Simple steps like keeping doors closed as much as possible and monitoring the defrost cycle can keep your system running efficiently and reliably, helping to avoid costly repairs down the track.
If the problem keeps coming back, it’s a sign that a deeper issue may be affecting your system, and it’s time to call in a professional refrigeration technician, like those at All So Cool.
At All So Cool, we specialise in the supply, installation, maintenance and repair of commercial refrigeration systems. Our team is experienced in diagnosing problems fast and getting your systems back to peak performance with minimal disruption.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.