Enhanced Flow Dynamics: Supports the Straight-Thru-Flow design to reduce frictional resistance and increase overall capacity

you know that maintaining precise manifold pressure is critical for combustion stability

Can I use this switch in both gas and electric furnaces

it monitors discharge air temperature at the vent

Lennox 42J04 Limit Switch Enhanced Flow Dynamics: Supports 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