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The Goodman 10123529 is a genuine OEM manual-reset high-limit (rollout/over-temperature) safety switch for the AMVC80803BXBC variable-capacity gas furnace and compatible Goodman/Amana models. This normally-closed thermal switch opens the ignition/gas-valve circuit if it senses excessive temperature or flame rollout, shutting the furnace down to prevent overheating and heat-exchanger damage. Unlike an auto-reset limit, it requires a manual button press to restore operation — a deliberate safety design that flags a fault for inspection.
The OEM Goodman switch is calibrated to the factory trip temperature and terminal layout for exact fit and correct safety response. Our generic-equivalent option matches the trip point and mounting pattern at a lower price. For a safety control, we recommend OEM whenever possible to guarantee the rated cut-out temperature.
Rating: Easy (2/5). About 15–20 minutes. Cut power at the disconnect, note or photograph the wiring, unscrew the old switch, transfer the spade terminals to the new switch, and remount. Important: a tripped manual-reset limit indicates an underlying problem (blocked airflow, failing blower, or cracked heat exchanger) — diagnose the root cause before returning the furnace to service. A licensed technician is advised.
Verify the model and trip temperature before ordering. Need help? info@nationalhvacparts.com.