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The Goodman 10728343 is a genuine OEM high-limit switch for the WGGE4360A140MAB gas furnace and compatible Goodman and Amana models. This temperature-sensing safety control monitors heat exchanger and plenum temperature, interrupting the burner circuit if the furnace exceeds its safe operating limit. It is a core component of the furnace's layered safety system.
This genuine OEM Goodman limit switch is calibrated to the exact trip temperature your furnace requires. Because it directly controls a safety shutdown, a mismatched generic switch can cause repeated nuisance lockouts or fail to protect the heat exchanger. OEM is the correct choice for any safety limit control.
Moderate — Power off the furnace, remove the burner/control access panel, unscrew the mounting bracket, and transfer the two wire leads. Typically a 15–25 minute job for an HVAC technician or an experienced DIYer with a meter.