Mars L180-2 Limit Switch, Open on Temp Rise at 180, Auto Close at 160 (39048)

About the Mars L180-2 Limit Switch, Open on Temp Rise at 180, Auto Close at 160 (39048)

Save now and get a deal on the Mars 39048 L180-2 Limit Switch from PlumbersStock.com. Limit switches are sensors that detect when a furnace has exceeded operational temperature limits and shut the appliance down as a safety measure. The way it works is that if your temperature gets to a concerning level, the limit switch will automatically open the circuit so it shuts off. It will remain off until the switch automatically closes the circuit when the temperature reaches the off threshold. Mars has a strong reputation in the heating and cooling industry for quality manufacturing.