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The Goodman 10690402S Interlock Door Switch is a genuine OEM blower-door safety switch for the VCSS960603BNAA gas furnace. This plunger-actuated switch de-energizes the furnace whenever the blower access panel is removed, protecting technicians and homeowners from live electrical and moving-blower hazards during service.
If your furnace is completely dead with no board lights, a stuck or broken door switch is a frequent and inexpensive culprit — the panel may not be depressing the plunger, or the internal contacts have worn out. Replacing it restores power to the control board.
The OEM 10690402S matches the factory plunger length and mounting bracket so the door reliably actuates it. Generic switches may sit at the wrong depth, leaving the furnace intermittently dead or defeating the safety entirely. OEM fit is the safer, cleaner choice.
About a 10-minute job. Turn off power at the disconnect, unclip the two wires, release the switch from its mounting tab, and snap the new one in. Confirm the panel depresses the plunger fully when reinstalled.