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The Goodman 10123534 Manual Reset Limit Switch is a genuine OEM safety control for the WGFD293070V4CAB gas furnace and related Goodman/Amana equipment. This normally-closed thermal switch opens the control circuit if it senses excessive heat — from a blocked heat exchanger, restricted airflow, or flame rollout — shutting the furnace down to prevent damage and hazardous conditions. Because it is a manual-reset device, it stays open until the red button is pressed, alerting the technician that an overheat event occurred and needs investigation.
The genuine Goodman OEM switch is calibrated to the exact trip temperature specified for this furnace's heat exchanger. Substituting a generic limit with a different setpoint can cause nuisance trips or, worse, fail to protect the unit. As a life-safety component, OEM calibration matters.
Easy (1/5). Turn off power, remove the two mounting screws, transfer the two spade wires one at a time (so you can't reverse them), and mount the new switch. Reset the button and restore power. Roughly 15 minutes with a nut driver. If the new switch trips again, diagnose airflow or the heat exchanger before repeat resets.