Mars L135-2 Limit Switch, Open on Temp Rise at 135, Auto Close at 115 (39054)

About the Mars L135-2 Limit Switch, Open on Temp Rise at 135, Auto Close at 115 (39054)

Save now when you buy the Mars 39054 L135-2 Limit Switch here 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 leader in the industry for obvious reasons. They make great HVAC solutions.