If the evaporator in a reach-in freezer is coated with a large quantity of ice, what is the effect?

When the evaporator in a reach-in freezer is coated with a large quantity of ice, the system operates less efficiently. Ice buildup on the evaporator coils acts as an insulating barrier, reducing the surface area available for heat exchange. This means that the system struggles to absorb heat from the interior of the freezer effectively, resulting in a decrease in overall cooling capacity.

As the ice accumulates, the compressor has to work harder to achieve the desired temperature, which can lead to increased energy consumption and potential wear on the components. Additionally, the airflow through the coils can be restricted because of the ice, further hampering cooling efficiency. Therefore, this reduced heat transfer capability and increase in workload contribute to the freezer's overall decrease in efficiency.