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suitable for most forced air furnace and rooftop unit HSI systems
the neon bulb has likely reached its end of life
providing a secure
Designed for use in "dry" evaporators
Common symptoms include the indoor blower running constantly or the burner failing to ignite (tripped safety)
Armstrong Furnace R40154B004 Limit Switch suitable for most forced airThe 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
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