Lennox 42J04 Limit Switch Measuring 34 inches in length

Measuring 34 inches in length with a 1/8" OD (Outer Diameter)

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

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

000 ohm bleed across 1/4-inch terminals

Lennox 42J04 Limit Switch Measuring 34 inches in lengthThe 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