Armstrong Furnace R40154B004 Limit Switch This high-reliability component is essential

This high-reliability component is essential for maintaining the power factor and extending the operational lifecycle of motor windings in residential and light commercial cooling systems

Extended Service Rail: Engineered for up to 60

Designed for use in "dry" evaporators

the neon bulb has likely reached its end of life

Also identified as part number WB-11096

Armstrong Furnace R40154B004 Limit Switch This high-reliability component is essentialThe Armstrong Furnace R40154B004 Limit Switch is a critical safety component designed for precise thermal regulation within residential heating systems. Engineering for reliability, this L170F 30 limit control features a factory set 140 170F temperature range, ensuring the burner circuit interrupts if internal temperatures exceed safe operational parameters. As an authentic OEM Armstrong replacement part, it provides high limit protection for Allied