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The Goodman 10690402S Interlock Door Switch is a genuine OEM blower-door safety switch for the VMES960403ANAA gas furnace. This plunger-style interlock cuts power to the furnace whenever the blower access panel is removed, preventing the unit from operating with the door open. A stuck or broken door switch is a frequent cause of a completely dead furnace — no lights, no ignition, no blower.
The OEM Goodman switch has the exact plunger length and mounting footprint so the blower door depresses it fully when latched. Generic switches often sit at a slightly different height, leaving the furnace intermittently dead even with the door closed. For a reliable, code-compliant repair, use the OEM part.
Easy. Shut off power, transfer the two wires to the new switch, snap or screw it into the same bracket, and confirm the door plunger engages fully. About a 10-minute job.