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The Goodman B1370155 Auxiliary Limit Switch is a genuine OEM temperature safety control for the GMNTE080-4 gas furnace. Typically mounted in the blower compartment, this auxiliary limit opens the control circuit at 120°F to guard against heat buildup caused by a stalled blower, dirty filter, or restricted airflow — preventing damage to the heat exchanger and surrounding components.
The OEM Goodman B1370155 delivers factory-calibrated accuracy at the 120°F setpoint and an exact mechanical fit. Our generic replacement carries the same rating and terminal configuration for a reliable, cost-effective repair on out-of-warranty units. Both are UL-recognized limit controls.
Easy (1/5). Kill power to the furnace, note wire positions, remove the two push-on terminals and mounting screws, then install the replacement in the same orientation. No specialized tools needed. Verify blower operation and airflow after the repair.