The Mitsubishi Electric U41002200 Thermistor TH21 is a temperature-sensing component designed for compatible Mitsubishi Electric HVAC systems. It detects temperature changes and sends resistance-based signals to the control board, allowing the system to monitor operating conditions and adjust performance accordingly. Commonly used in ductless mini-split air conditioners, heat pumps, a... https://www.partshnc.com/mitsubishi-electric-u41002200-thermistor-th21