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The Goodman 10690402S is a genuine OEM blower-door interlock switch for the Goodman/Amana AMSS961005CNAA gas furnace and compatible models. This spring-plunger safety switch mounts inside the blower compartment and is held closed by the access panel. When the door is in place the circuit is complete and the furnace can operate; the moment the panel is removed the plunger extends, opening the circuit and cutting 120V power to the furnace. It prevents the blower and burners from running with the cabinet open, protecting technicians and homeowners during service.
The plunger length and mounting bracket must match so the panel reliably depresses the switch. The genuine OEM 10690402S seats correctly and carries the proper voltage/current rating. An ill-fitting generic can leave the furnace dead when the panel is on, or fail to cut power when it is removed — defeating the safety function.
Easy (1 of 5). Turn off power at the disconnect, note the wire positions, transfer the two spade connectors to the new switch, and secure it in the same bracket. Typical replacement takes 10–15 minutes. Confirm the furnace only energizes with the blower door fully seated.