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The Goodman 10123537 Manual Reset Limit Switch is a genuine OEM high-limit safety control engineered for GMV950905DXA 95% AFUE gas furnaces. Mounted on the heat exchanger or burner assembly, this gray-bodied switch continuously monitors supply-air temperature and interrupts the gas valve circuit if the furnace overheats, protecting the heat exchanger from thermal damage and preventing unsafe operation.
Because it is a manual reset device, it will not automatically re-close after a trip — the switch must be physically reset once the fault (blocked filter, failed blower, restricted ductwork) has been corrected, ensuring a technician verifies the system before it fires again.
Genuine OEM 10123537 units are calibrated to the exact trip and reset temperatures specified for your furnace's heat exchanger. Generic snap-disc substitutes often carry incorrect setpoints, which can nuisance-trip or, worse, fail to open when needed. For a safety-critical limit control, OEM is strongly recommended.
Install Difficulty: Easy (1/5) — remove the burner-compartment panel, disconnect two spade terminals, unscrew the mounting bracket, and swap. Always shut off gas and power first.