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Constructed from high-quality galvanized steel
Measuring 34 inches in length with a 1/8" OD (Outer Diameter)
000 ohm bleed across 1/4-inch terminals
Built with a classical A-section profile
and ProTech equipment
Lennox 42J04 Limit Switch Constructed from high-quality galvanized steelThe Lennox 42J04 Limit Switch is a critical OEM replacement part designed for high limit thermal protection in residential and commercial HVAC systems. Engineered to maintain safe operating parameters, this 135 175F Auto Limit Switch features an automatic reset mechanism that interrupts the heating circuit if internal plenum temperatures exceed the 175F threshold, preventing heat exchanger damage and ensuring system safety. This fixed temperature
