Mars L200-4 Limit Switch, Open on Temp Rise at 200, Auto Close at 160 (39024)

About the Mars L200-4 Limit Switch, Open on Temp Rise at 200, Auto Close at 160 (39024)

Get a low price on the Mars 39024 200 Limit Switch L200-40 Auto Reset 3/4" here online at PlumbersStock. 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 designs HVAC solutions that are both affordable and practical.