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The Goodman 10690402S Interlock Door Switch is a genuine OEM blower-compartment safety switch for VCSS960804CNAA gas furnaces and related Goodman/Amana models. This normally-open plunger switch cuts all power to the furnace whenever the blower access door is removed, protecting technicians and homeowners from live electrical and moving components. A furnace that is completely dead with no display is very often caused by a stuck or failed door interlock switch.
The OEM 10690402S matches the original plunger height and bracket geometry so the door depresses it fully and reliably. Generic switches can sit at a slightly different height and fail to close, leaving the furnace intermittently dead. For a low-cost safety part, OEM is well worth it; a generic is acceptable only if the mounting and plunger travel are confirmed identical.
Easy (1/5). Disconnect power, unclip the bracket, move the two wires, and snap the new switch in place. Confirm the door fully depresses the plunger. About 10 minutes.