Lennox 20W36 Limit Switch 30067439-890 Optimized Performance: Specifically calibrated for

Optimized Performance: Specifically calibrated for 3

using this genuine OEM contactor is essential for maintaining precise control over electrical loads and ensuring the system operates within manufacturer specifications

This HVAC manifold gauge features comprehensive scales for R-12

Adjust the 2374-510 using the provided calibration springs until the switch closes at the manufacturer's specified "inches of water column" rating

Using a shorter probe can result in inaccurate readings and delayed safety response

Lennox 20W36 Limit Switch 30067439-890 Optimized Performance: Specifically calibrated forThe Lennox 20W36 Limit Switch is a critical safety component designed for precise thermal regulation within Lennox residential furnace heating systems. Engineered as a 110 150F AUTO limit switch, this L150 40F thermal control monitors the heat exchanger temperature to prevent overheating conditions. When the high limit sensor detects temperatures exceeding the 150 degree threshold, it interrupts the burner circuit, resetting automatically once the