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Simplified Wiring: Includes a customizable installation harness to adapt legacy wiring to the modern All-Spark footprint
this OEM Carrier replacement part ensures accurate detection of low-flow or no-flow conditions to prevent heat exchanger freezing or compressor damage
facilitating the precise voltage and control signals necessary for variable-speed performance
ensuring that if airflow drops below the setpoint
Lennox 73W18 Limit Switch 318973-401 Simplified Wiring: Includes a customizableThe Lennox 73W18 Limit Switch (Model 102857 05) is an essential OEM replacement part designed for high precision thermal protection in residential and commercial heating cycles. This auto limit control switch features a STILT design and is specifically calibrated to actuate at 150F (cut out) and automatically reset at 120F (cut in), maintaining a strict 30 degree differential to protect the heat exchanger from overheating conditions. Built with a