This thermal rollout switch features a 350 degrees F actuation point with a manual reset mechanism

or obstructed vent piping causing flames to "roll out" toward the burners

Proper ignitor positioning is critical for consistent furnace startup

the 669 covers four horsepower ratings

Lennox 71W48 Orifice 319825-402 This thermal rollout switch featuresThe Lennox 71W48 Orifice is a precision engineered . 034 LP orifice designed for liquid propane conversion and flow regulation in specific Lennox heating units. As a vital component in the combustion string, this 0. 034 injector ensures the correct air to fuel ratio required for efficient burner performance. Heavy duty brass construction provides the necessary thermal resistance to withstand high temperature environments without deforming or