Lennox 42J04 Limit Switch physical dimensions and latch points

physical dimensions and latch points may vary

As a genuine L255F-30 Auto Limit Switch

How do I install the anti-rotation bracket correctly

30-amp magnetic contactor designed as a reliable field swap for problematic switches in residential and light commercial condensers

ensuring precise equal percentage flow characteristics in demanding hydronic and steam applications

Lennox 42J04 Limit Switch physical dimensions and latch pointsThe 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