Mars MR190 Manual Reset Limit Switch, Open on Temp Rise 190 (39097)

About the Mars MR190 Manual Reset Limit Switch, Open on Temp Rise 190 (39097)

Shop now and get the Mars 39097 190 Limit Switch MR190 Manual 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. The circuit will remain open/off until it is manually reset. Mars has made a name for itself by manufacturing reliable heating and cooling products.