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Maintain safe operating temperatures in your Goodman ADS80703ANA furnace with the genuine Goodman B1370155 auxiliary limit switch, rated at 120°F. This secondary high-limit control monitors temperature in the blower compartment or secondary heat-exchanger area and opens the heating circuit if it senses an overheat condition caused by restricted airflow, a dirty filter, or a failed blower. It works alongside the primary limit to keep the furnace from running hot and to protect surrounding components.
As a calibrated safety control, the trip point must match the furnace design. The OEM Goodman B1370155 is set to the factory 120°F specification with the correct mounting and terminals for a true plug-and-play fit. Generic limits with a different setpoint can cause nuisance shutdowns or fail to protect the unit. For correct, safe operation, use OEM.
Easy (DIY-friendly). About 10–15 minutes with basic hand tools. Disconnect power before servicing. Remove the mounting screws, transfer the wiring connectors one at a time, and fasten the new switch. If the original tripped, correct the root cause — commonly a clogged filter or weak blower — before restarting. If you are unsure, consult a licensed HVAC technician.