IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman 20162903 Primary Limit Switch is a genuine OEM high-temperature safety control rated to open at 150°F, designed for the Goodman WFD195090S5DAB gas furnace. Mounted on the heat exchanger or blower housing, this snap-disc switch shuts down the burners if the furnace overheats — protecting the heat exchanger and preventing dangerous conditions. A failed limit switch causes short cycling, no-heat lockouts, or a furnace that won't fire at all.
OEM vs. Generic: Limit switches are life-safety components, and the trip temperature must match the furnace's original design. Genuine OEM 20162903 switches are calibrated to the exact 150°F factory setpoint and mounting footprint. Generic switches with slightly different trip points or bracket geometry can nuisance-trip or fail to protect the heat exchanger. For safety controls, use OEM.
Install Difficulty: Easy to Moderate (2/5). Disconnect power, unplug the two wire terminals, remove the two mounting screws, and install the new switch in the same orientation. A capable DIYer can do this in about 15 minutes.