Most frequent "open limit" errors are caused by restricted airflow

As a genuine Trane OEM replacement part

Direct OEM Compatibility: Engineered as the exact replacement for GKT2513 and GKT2513K

meaning it will close the circuit once the temperature drops to 160°F

and Arcoaire furnaces

White-Rodgers 3L02-190 Limit Switch Most frequent "open limit" errorsThe White Rodgers 3L02 190 Limit Switch is a high performance 3 4" snap disc limit control designed for precise thermal regulation in HVAC systems and furnace safety circuits. This industrial grade component, also identified by manufacturer number 60T15 330537, features a manual reset mechanism and a fixed 190F cut out temperature. Engineered with an Open on Rise switch action and a sturdy SPST configuration, it is primarily used as a high limit