Mars L270-4 Limit Switch, Open on Temp Rise at 270, Auto Close at 230 (39030)

About the Mars L270-4 Limit Switch, Open on Temp Rise at 270, Auto Close at 230 (39030)

Enjoy savings when you buy the Mars 39030 270 Limit Switch L270-40 Auto Reset 3/4" while it's still in stock 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 is an industry leader because of their quality HVAC solutions.