IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman B1370190 Primary Limit Switch is a genuine OEM high-limit control for the Amana/Goodman AMS80453ANAA gas furnace. Mounted on the heat exchanger partition, this 210°F primary limit is the furnace's main overheat protection — it opens the burner circuit when supply-air temperature climbs too high due to restricted airflow, a dirty filter, or blower failure, preventing heat-exchanger damage.
OEM vs. Generic: This genuine Goodman OEM limit is calibrated to the exact 210°F cut-out and matched to the furnace's mounting flange and insertion depth. Generic switches with different trip points or probe lengths can cause repeated lockouts or fail to protect the heat exchanger. For the furnace's primary safety, OEM is the correct choice.
Install Difficulty: Easy (1/5). Kill power, remove the two mounting screws, transfer the spade wires to the new switch, and reinstall on the partition panel. Replacement typically takes 10–15 minutes. Verify a full heat cycle completes without a limit trip.