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The Goodman 20269903 is a genuine OEM auxiliary auto-reset limit switch for the WGGE4360A140MAB gas furnace and compatible Goodman and Amana equipment. This secondary safety control supplements the primary high-limit, guarding against overheating in the blower compartment or a specific zone of the furnace. Being auto reset, it closes again automatically once temperatures return to a safe range.
This genuine OEM Goodman auxiliary switch carries the exact temperature rating and form factor designed for your furnace. Generic substitutes with different setpoints can cause intermittent, hard-to-diagnose shutdowns. For a secondary safety device, OEM ensures the whole protection chain behaves as engineered.
Easy to Moderate — Cut power to the furnace, locate the auxiliary switch (often on the blower housing or heat exchanger bracket), and swap the two spade connectors and mounting screw. Usually completed in 10–20 minutes.