Why Temperature Variations Are Normal in Your Commercial Fridge

In a commercial refrigeration unit, temperature fluctuations on the display are normal. The system is designed to reach the set temperature and then stop. It remains off until the internal temperature rises to a specified differential above the set point. For example, a freezer set at -18°C with a 4°C differential will stop cooling at -18°C. The display might show a lower temperature as the air settles. When the air temperature near the probe reaches -14°C, the cooling cycle restarts. These minor air temperature changes don't significantly affect the temperature of the stored products.

The temperature differential is crucial to prevent short cycling of the compressor, which consumes more energy, can cause electrical issues, and shorten the equipment's lifespan.

This principle applies to all commercial refrigeration equipment, including fridges, freezers, ice makers, and bar coolers. Such fluctuations are completely normal.

Domestic fridges typically do not display live temperature readings, only set points or averages, to avoid alarming users over minor changes.

For commercial units, the digital display shows the live air temperature inside the cabinet, not the temperature of the food or drinks. Due to their density, the internal temperature of the stored items remains stable unless the cabinet door is left open for long periods.

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