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The Goodman 20269903 Auxiliary Limit Auto Reset Switch is a genuine OEM secondary safety control for the WGGE4549A115MAA gas furnace. Mounted near the blower housing or supply plenum, this auxiliary limit provides a second layer of overheat protection beyond the primary high-limit. When temperatures exceed the safe threshold, it opens the control circuit to stop the burners; once the furnace cools, the automatic reset closes the contacts and normal operation resumes without manual intervention.
This genuine Goodman OEM switch is calibrated to the factory trip and reset temperatures for your furnace. Generic auto-reset limits may cycle at incorrect setpoints, causing short-cycling or leaving the furnace unprotected. Because this is a redundant safety device, the OEM part keeps the original protection scheme intact.
Easy (1/5). Two spade terminals and two mounting screws. Disconnect power before servicing. Frequent tripping usually points to an airflow restriction or blower issue that should be corrected.