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The 10690402S is a genuine OEM blower-door interlock switch for the Goodman / Amana AMVC961205DNAA variable-speed gas furnace. This normally-open plunger switch cuts 120V power to the furnace whenever the blower access panel is removed, preventing operation with the door open. A stuck, broken, or missing door switch is a common cause of a completely dead furnace — no lights, no blower, no ignition — because the control board never receives power.
The genuine switch matches Goodman's exact plunger length, bracket, and contact rating so the door closes fully and makes reliable contact. Generic substitutes may sit at the wrong depth, leaving the furnace intermittently dead when the panel is on. OEM removes the guesswork on a line-voltage safety component.
Easy (DIY-friendly, 15–20 min). One or two screws and two wire terminals. Always disconnect furnace power at the breaker before servicing line-voltage parts.