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The Goodman B1370195 is a genuine OEM primary high-limit switch engineered for the Goodman ADS80453ANA gas furnace and compatible Goodman/Amana models. This normally-closed bimetal safety control monitors heat-exchanger temperature and shuts off the burners if the furnace overheats — protecting the heat exchanger, blower, and your home from dangerous high-temperature conditions. A failed limit switch is one of the most common causes of a furnace that short-cycles, locks out, or stops firing entirely.
The OEM Goodman B1370195 is calibrated to the exact 300°F trip point specified for your furnace and carries factory tolerances for reliable, repeatable operation. Generic or universal limit switches may use approximate trip temperatures or different mounting footprints, risking nuisance trips or improper protection. For a critical safety component, OEM is the recommended choice.
Easy (2/5). Replacement typically takes 15–20 minutes with basic hand tools. Always disconnect power at the breaker before servicing. Note the wire positions, remove the two mounting screws, transfer the spade terminals, and reinstall. If you are unsure or smell gas, contact a licensed HVAC technician.