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The Goodman 10690402S Interlock Door Switch is a genuine OEM safety component engineered for the AMSS960803BNAA gas furnace and compatible Goodman/Amana models. This blower-door interlock switch cuts power to the furnace whenever the access panel is removed, protecting service technicians and homeowners from live electrical and moving-blower hazards. A worn or failed door switch is a common cause of a furnace that won't start even though it has power — restoring the correct OEM switch brings the safety circuit back online.
The genuine OEM switch matches the factory plunger travel, contact rating, and mounting footprint exactly, so it seats correctly against the blower door and trips at the right point. Generic aftermarket switches often have slightly different actuator lengths that fail to make consistent contact, leading to intermittent no-start faults. For a safety-circuit part, OEM is the recommended choice.
Easy (2/5). Disconnect furnace power, remove the blower access panel, unclip the two spade terminals, unscrew the old switch, and mount the replacement. Most DIYers finish in under 15 minutes with a screwdriver. Always confirm power is off at the breaker before servicing.
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