Lennox 42J04 Limit Switch How do I install the

How do I install the anti-rotation bracket correctly

System Restoration: Eliminates internal leakage and restores accurate linear flow characteristics in aging HVAC systems

As a genuine L255F-30 Auto Limit Switch

This technical component is critical for multi-stage valve sequencing and applications requiring tight pneumatic control

physical dimensions and latch points may vary

Lennox 42J04 Limit Switch How do I install theThe 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