Lennox 42J04 Limit Switch 000 ohm bleed across 1/4-inch

000 ohm bleed across 1/4-inch terminals

ensure your mounting bracket is designed for a round canister rather than an oval one to secure the part properly

Capable of handling 25A resistive loads at 120V or 240V

Common Technician Questions: How do I verify if this filter fits my specific Johnson Controls air dryer

and ProTech equipment

Lennox 42J04 Limit Switch 000 ohm bleed across 1/4-inchThe 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