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The Goodman B1370188 Primary Limit Switch is the genuine OEM high-limit control for GMNTE060-3 gas furnaces and compatible Goodman/Amana equipment. Mounted on the heat-exchanger plenum, this switch continuously monitors supply-air temperature and opens at approximately 170°F to de-energize the burners if the blower fails or airflow is restricted — a critical defense against heat-exchanger cracking and overheating.
This OEM B1370188 is factory-matched to the correct 170°F trip point and disc diameter for your furnace. Generic limit switches with incorrect open temperatures are a leading cause of short-cycling and repeat service calls. For proper burner sequencing and safety compliance, install the OEM part.
Easy (1/5). Disconnect power, remove two mounting screws, transfer the two wire leads, and reinstall. Typically a 15-minute job. Confirm the sensing disc seats flush against the plenum for accurate temperature reading.