Armstrong Furnace R40154B004 Limit Switch Key Benefits Universal Compatibility: Multi-tap

Key Benefits Universal Compatibility: Multi-tap primary (120/208/240VAC) allows one unit to cover most standard HVAC equipment installations

Common Questions What is the purpose of the L50-10F designation

The assembly features a high-sensitivity cadmium sulfide (CdS) photo-conductive cell that monitors the burner flame

The Lennox 12F19 Flame Sensor is a critical safety component designed for precise flame rectify detection in residential and commercial gas-fired heating systems

Common Questions Does this coupler fit 1/2-inch or 3/8-inch pushrods

Armstrong Furnace R40154B004 Limit Switch Key Benefits Universal Compatibility: Multi-tapThe 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