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The Goodman 10123533 Manual Reset Limit Switch is a genuine OEM safety control that monitors temperature in the furnace and opens the circuit if it senses an over-temperature or flame-rollout condition. Because it is a manual-reset device, it stays open after a trip and must be reset by hand — alerting the homeowner or technician to investigate the underlying cause before the furnace can fire again. It is a direct-fit replacement for the Goodman ACVC960403BNBA furnace.
The OEM Goodman switch is calibrated to the exact trip temperature specified for this furnace. A generic switch with a different setpoint can nuisance-trip or, worse, fail to protect against a genuine overheat. For a critical safety component, OEM calibration is strongly recommended.
Moderate (2/5). Requires removing the access panel, disconnecting two spade terminals, and unscrewing the bracket. Always shut off electrical power and gas first. If the switch has tripped, diagnose the root cause (blocked flue, dirty filter, weak blower) before resetting.