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the internal bimetal disc may be stuck open
Key Benefits Universal Compatibility: Multi-tap primary (120/208/240VAC) allows one unit to cover most standard HVAC equipment installations
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 What is the purpose of the L50-10F designation
Always verify the cabinet rail width before installation to ensure a friction-tight fit
Armstrong Furnace R40154B004 Limit Switch the internal bimetal disc mayThe 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
US$ 699.50
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US$ 999.50