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The Goodman 10123529 is a manual reset rollout limit switch engineered for the ACVM970803BNBA gas furnace and other compatible Goodman and Amana models. This safety control monitors burner flame rollout and shuts off the gas valve if flames escape the heat exchanger, protecting your equipment and home from overheating and combustion hazards. As a normally-closed switch with a manual reset button, it requires a deliberate reset after a trip — alerting you to investigate the root cause rather than masking a recurring fault.
The genuine Goodman OEM 10123529 is calibrated to the exact trip temperature specified for your furnace, ensuring the safety circuit responds within factory tolerances. Aftermarket equivalents may differ in trip point and reset force, risking nuisance trips or delayed shutdown. For a life-safety component, OEM is strongly recommended.
Easy (1/5) — Two-wire connection and a single mounting screw. Always shut off power and gas before servicing. If the switch trips repeatedly after replacement, have the heat exchanger and venting inspected by a licensed HVAC technician.