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The Goodman 10690402S is a genuine OEM blower-compartment interlock door switch for the AMSS960805CNAA gas furnace. This plunger-style safety switch de-energizes the furnace whenever the blower access panel is removed, protecting technicians from live electrical terminals and a spinning blower wheel. A furnace that is completely dead — no ignition, no blower, no board activity — with the panel installed is frequently traced to a stuck, misaligned, or failed door switch.
The genuine 10690402S has the exact plunger throw and bracket position so the panel reliably closes the contacts every time. An ill-fitting generic switch may fail to actuate — leaving the furnace dead even with the door on — or leave power live with the door off, defeating the safety purpose. OEM ensures correct fit and function.
Easy (2/5) — about 15 minutes. Cut power at the disconnect, remove the blower panel, unclip the two wire leads, and unscrew the switch from its bracket. Install the replacement in the same position, reconnect, and confirm the panel presses the plunger fully when reinstalled. Never bypass or tape down this switch.