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The Goodman B1370253 Stack Overtemp Limit Switch is a genuine OEM safety control designed for the Goodman GSU060-3 gas furnace. This normally-closed switch monitors flue and stack temperature and opens the control circuit at its 140°F trip point to shut the furnace down before an unsafe overheat condition can develop. Replacing a failed or nuisance-tripping overtemp switch restores safe, reliable heating operation.
This is a true Goodman OEM switch, calibrated to the exact 140°F setpoint the furnace was engineered around. Aftermarket generic switches may carry looser tolerances or incorrect trip points, which can cause premature shutdowns or, worse, fail to protect the appliance. For a safety-critical component, OEM is strongly recommended.
Easy (1/5). A basic two-wire, single-screw replacement for most DIYers. Always disconnect power at the breaker before servicing. If the switch keeps tripping, consult a licensed HVAC technician, as repeated overtemp trips can indicate a blocked flue or airflow problem.