Engineered Durability: Robust construction with a 3-1/8" probe designed for internal mounting in high-heat environments

By monitoring discharge air or internal cabinet temperatures

this sensor is engineered to provide precise microamp signal feedback to the furnace control board

System Integrity: Prevents pressure switch faults by maintaining the structural vacuum required for proper inducer motor operation

Enhanced Diagnostics: The transparent window allows for real-time flow observation to identify circulation problems or undercharged systems

Weil McLain 383-500-125 Sensor Engineered Durability: Robust construction withThe Weil McLain 383 500 125 Outdoor Temp Sensor is a critical OEM component designed to provide real time ambient temperature data to the Weil McLain Ultra Gas Boiler control module. By utilizing a 12k ohm thermistor encapsulated in a weather resistant housing, this outdoor reset sensor allows the boiler to dynamically adjust its firing rate and supply water temperature based on external conditions. This process, known as outdoor reset logic,