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The Goodman 10690402S Interlock Door Switch is a genuine OEM blower-door safety switch for the AMES961005CNAA gas furnace and compatible Goodman/Amana models. This plunger-style interlock cuts power to the furnace whenever the blower access panel is removed, preventing the unit from operating with the door open. A stuck, broken, or missing door switch is a common reason a furnace appears completely dead — no lights, no inducer, no ignition — because the control board never receives line voltage until the switch is closed.
The OEM 10690402S offers exact bracket alignment and plunger travel so the door reliably actuates the switch. Our Generic equivalent provides the same switching function and terminals at a lower price for out-of-warranty repairs. Both are direct replacements.
Difficulty: Easy (1/5). Disconnect power, unclip the two wire terminals, remove the mounting screw, and install the new switch in the same position. Confirm the panel depresses the plunger fully on reassembly. About 10 minutes — never tape or bypass a door switch to "fix" it.