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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM thermal safety component engineered for the AMH80905CXCC gas furnace and compatible Goodman and Amana models. This normally-closed thermal cutout monitors heat-exchanger and blower-compartment temperatures, opening the control circuit to shut down the burners if the furnace overheats due to restricted airflow, a dirty filter, or blower failure. Installing a genuine OEM switch preserves the factory trip point and safety certification of your equipment.
Our genuine Goodman OEM switch is calibrated to the exact factory temperature trip point, ensuring proper cycling and full compliance with the furnace's safety rating. Aftermarket generic switches often use approximated trip temperatures that can cause nuisance lockouts or, worse, fail to trip at the correct threshold. For a safety-critical component, OEM is strongly recommended.
Rating: Easy (2/5). Disconnect power at the breaker, remove the two mounting screws and the spade wire connectors, then reverse to install the replacement. Typical time is 15–20 minutes. Always confirm power is off and verify the wiring diagram before servicing. If you are not comfortable working near live gas-appliance controls, consult a licensed HVAC technician.