The TRUE 800393 Refrigerator Cooler Control W/ Knob Plate and 3/8" X 1-1/2" Coiled Bulb is designed to regulate cooling in compatible units. This control assembly includes an adjustable knob and a coiled sensing bulb that monitors internal cabinet temperature. It works by detecting temperature changes through the bulb and cycling the compressor on or off to maintain the desired setting. The TRUE 800393 Refrigerator Cooler Control W/ Knob Plate and 3/8" X 1-1/2" Coiled Bulb helps ensure consistent cooling conditions, supports energy-efficient operation, and reduces temperature fluctuations. Its integrated design allows for straightforward installation and dependable performance in commercial refrigeration environments.Replaces FOGEL: CT-35A, CT-35L