Mars L230-4 Limit Switch, Open on Temp Rise at 230, Auto Close at 190 (39027)

About the Mars L230-4 Limit Switch, Open on Temp Rise at 230, Auto Close at 190 (39027)

Buy now to get a deal on the Mars 39027 230 Limit Switch L230-40 Auto Reset 3/4" with the experts 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 is a reputable heating and cooling manufacturer and we are so proud to carry their products.