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The Goodman 10690402S Interlock Door Switch is a genuine OEM blower-compartment safety switch for the Amana/Goodman AMES960403ANAA furnace and compatible models. This spring-plunger interlock cuts power to the furnace whenever the blower access door is removed, preventing operation with the panel open — a required code-safety function.
The OEM 10690402S is dimensioned to seat correctly against your furnace's door frame so the plunger travel matches the factory bracket. Generic switches often have different plunger heights or mounting-hole spacing, leading to a furnace that won't start with the door on — or worse, one that runs with it off. OEM ensures the interlock works as designed.
Easy — mounts with one or two screws and two spade terminals. Disconnect power first, note wire positions, and confirm the plunger is depressed when the door is seated.