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The Goodman 10690402S interlock door switch is a genuine OEM blower-door safety switch designed for the AMSS961205DNAA gas furnace and related Goodman/Amana models. This normally-open plunger switch cuts power to the furnace whenever the blower access panel is removed, preventing operation with the door open. A worn or stuck door switch is a frequent cause of a completely dead furnace with no display or ignition.
The OEM 10690402S has the exact plunger length and mounting geometry so the panel actuates it reliably. Generic switches often sit at the wrong depth, leaving the furnace intermittently dead when the door flexes. Genuine fit avoids callbacks.
Easy (1 screwdriver). One or two screws and two wire terminals, about 10 minutes. Shut off power at the disconnect first.