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The 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
preventing blockage in sensitive modulator and regulator orifices
Key Benefits Universal Compatibility: Includes both natural gas and LP orifices for flexible fuel system integration
Tamper Prevention: Allows the main control to be mounted in a secure utility room while sensing the actual living or workspace temperature
MARS 19004 Potential Relay Els PW 17895 The Weil McLain 383-500-125 OutdoorThe MARS 19004 is a professional grade 65 potential relay engineered for heavy duty single phase compressor start applications. Rated for a 332 continuous coil voltage, this component is a critical direct replacement relay for problematic 90 3, 90 65, and 3ARR3MARS65 units often found in high performance HVACR systems. Unlike standard relays, this non positional potential relay utilizes back EMF (electromotive force) to precision disengage the start