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The Goodman 10728343 Limit Switch is a genuine OEM temperature safety control for the GMPE100-4A gas furnace. This normally-closed switch monitors furnace temperature and opens to cut the burners if heat rises beyond a safe threshold — a core safety feature that protects the heat exchanger and blower assembly. When this switch fails open, the furnace may lock out or refuse to fire; when it fails closed, overheating protection is lost.
The OEM Goodman switch carries the correct trip temperature and mounting footprint for the GMPE100-4A. As a safety device, matching the factory trip point matters — a generic limit with a different rating can nuisance-trip or, worse, fail to protect against overheating. For safety parts, OEM is the recommended choice.
Easy — DIY friendly (15 minutes). Cut power, remove the mounting screws, transfer the two spade terminals to the new switch, and remount. No calibration required. Always de-energize the furnace at the breaker before servicing.
Compatible with Goodman GMPE100-4A. Confirm your model and part number before ordering.