With 1/2 inch ODF connections

What causes a Lennox 44L65 limit switch to trip repeatedly

it facilitates a direct connection to compatible air handling units

The unit measures approximately 25 inches in length

Reznor 205444 Pressure Switch 328140-751 With 1/2 inch ODF connectionsThe Reznor 205444 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high efficiency gas fired systems. Factory set at 0. 30" WC (water column), this SPST (Single Pole Single Throw) switch ensures that the inducer motor is generating sufficient vacuum before allowing the ignition sequence to proceed, preventing unsafe operation due to vent blockages or motor failure. As a genuine OEM Reznor replacement