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Mars MR240 Manual Reset Limit Switch, Open On Temp Rise 240 (39042) |
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$19.25/
Retail: $11.55
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About the Mars 39042Save big on the Mars 39042 240 Limit Switch MR240 Manual Reset 3/4" 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. The circuit will remain open/off until it is manually reset. Mars is known for engineering innovation and practical solutions. |
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