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Built with a rugged steel shell construction
05 bar) to open fully and maintain stable operation
which is the standard for most commercial boiler control circuits
protecting the windings from thermal overload
Lennox 12J77 Limit 318423-701 Built with a rugged steelThe Lennox 12J77 Limit Switch is a critical safety component designed for precise temperature regulation in Lennox heating systems. Engineered as a Single Pole Single Throw (SPST) device, this fixed temperature limit control ensures operational safety by monitoring internal plenum temperatures. The switch features a 60F opening point and a 35F closing point, providing an narrow differential necessary for preventing equipment overheating or cycling
