The Trane WKF3.7A-887-020T Thermostat with Capillary (also known as SWT00842, C122872P02, X13100067020) is an OEM temperature control thermostat designed to regulate equipment with precise open and close temperature setpoints. It features a capillary sensor that controls circuits based on air or surface temperatures, opening at 25F and closing at 60F. Commonly used in Trane air handler and HVAC systems, this thermostat ensures dependable performance in demanding climate control applications. Key Features Temperature range: Opens at 25F, closes at 60F OEM Trane replacement part Capillary-style sensor for accurate temperature detection Reliable open-on-fall, close-on-rise functionality Designed for air handler temperature control and protection Specifications Part Numbers: WKF3.7A-887-020T, SWT00842, C122872P02, X13100067020 Temperature Control Type: Capillary Thermostat Open Temperature: 25F Close Temperature: 60F Voltage Rating: System dependent (acts as a switch) Mounting: OEM compatible installation Compatible Models TWE120B300BA, TWE180E300AA, TWE240B300FA, TWE090B300DA, TWE120EWR4AA, TWE240E400AA, TWE150E303AA, TWE240EWR3AA, TWE150E4R3BA, TWE120A100AB Why Choose This Item Choose the Trane WKF3.7A-887-020T Capillary Thermostat for precise and dependable temperature regulation in your HVAC system. It?s an original replacement part engineered for seamless integration with Trane air handlers, helping protect your system from temperature extremes and maintaining optimal performance. Ensure the longevity and efficiency of your unit with this OEM-grade, proven solution.