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The Goodman 10690402S Interlock Door Switch is a genuine OEM blower-compartment safety switch for the ACEC960603BNAB gas furnace and matching Goodman/Amana models. This normally-open plunger switch closes only when the blower access panel is properly installed, removing power from the furnace whenever the door is open to protect technicians from live components and rotating parts.
A furnace that won't start after service is frequently a stuck or worn door switch. The OEM 10690402S provides the exact plunger length, mounting tabs, and contact rating, ensuring reliable make/break that universal substitutes can't always match.
Easy (2/5). One or two screws and two wires, about 15 minutes. Always shut off power before replacing, and confirm the plunger aligns with the door tab.