Common problems seen during out commercial refrigeration repair service call visits include dirty coils, low refrigerant levels, faulty compressors, and malfunctioning thermostats. Dirty coils can reduce the efficiency of the equipment and cause it to work harder than it needs to, leading to higher energy costs. Low refrigerant levels can cause the equipment to freeze up and stop working. A faulty compressor can prevent the equipment from cooling properly. And a malfunctioning thermostat can cause a commercial refrigerator equipment to run too hot or too cold.