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The Goodman 10690402S interlock door switch is a genuine OEM blower-compartment safety switch for your AMSS921004CNAA furnace. This plunger-style switch cuts power to the furnace whenever the blower access panel is removed, preventing the unit from operating with the door off. A failed or stuck door switch is a frequent cause of a completely dead furnace — no display, no blower, no ignition — even when incoming power is fine.
This genuine Goodman OEM switch has the correct plunger length and bracket geometry so it seats and actuates properly against the factory door. Generic switches can have the wrong throw or footprint, leaving the furnace intermittently dead or unsafe. For a reliable fix, choose OEM.
Easy (1/5). One or two screws and two spade terminals — about a 10-minute repair. Disconnect furnace power at the disconnect and breaker before servicing, and verify the plunger depresses fully when the panel is reinstalled.
Fits Goodman and Amana furnaces including AMSS921004CNAA. Need help confirming fitment? info@nationalhvacparts.com.