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The Goodman 10690402S Interlock Door Switch is a genuine OEM safety component for the AMEC961004CNAC gas furnace. This normally-open plunger switch de-energizes the furnace whenever the blower-compartment door is removed, preventing operation with an open cabinet. A worn or stuck door switch is a common reason a furnace won't run even though power and thermostat calls are present.
The genuine Goodman OEM switch matches the exact plunger travel, bracket, and terminal layout of your furnace cabinet. Generic substitutes may not seat correctly against the door, leaving the furnace either dead or unsafely bypassed. OEM ensures the interlock works as designed.
Easy (DIY-friendly). Usually one or two screws and two spade terminals — about 10–15 minutes. Cut power at the breaker before servicing. Never bypass this switch; it is a required safety device.