The TRUE 800393 refrigerator cooler control provides accurate temperature regulation for consistent cooling performance. This control unit works by sensing temperature changes through its 3/8" x 1-1/2" coiled bulb, which expands or contracts to signal the system to cycle the compressor on or off as needed. Equipped with a knob plate, it allows for straightforward manual temperature adjustments. Designed for compatibility with select refrigeration units, it helps maintain stable internal conditions. Its reliable operation supports proper food storage, reduces temperature fluctuations, and helps improve overall system efficiency while minimizing unnecessary compressor run time.