The York 610021 (T-O-D 60T11) Hi Limit Thermostat/Fan Control is a durable snap-disc temperature control device designed to regulate blower fan operation and provide over-temperature protection in York HVAC systems. With a temperature rating of L230-40F, it opens at 230F and resets automatically at 190F, ensuring safe and efficient temperature control during heating operation. This thermostat is built to OEM standards for reliable performance and long service life. Key Features: Genuine York OEM Hi Limit Thermostat/Fan Control. Snap-disc design for reliable, consistent temperature response. Opens at 230F and closes at 190F (L230-40F). Provides overheat protection and fan control in furnace systems. Ensures safety and system reliability. Easy installation, direct-fit replacement. Specifications: Part Numbers: 610021 / 60T11 / L230-40F Type: Snap Disc, Hi Limit/Fan Thermostat Function: Opens at 230F, closes at 190F Temperature Rating: L230-40F Mounting: Surface mount, 2-hole bracket Terminal Type: 1/4" quick-connect Manufacturer: York (Johnson Controls) Compatible Models (short list): May fit various York gas furnaces and air handlers, including models in the P3, P4, G2, and G9 series, among others. Why Choose This Item: The York 610021 Hi Limit Thermostat safeguards your heating system by preventing overheating and maintaining proper fan cycling. As a genuine OEM replacement, it ensures a perfect fit, reliable temperature control, and the same performance standards as the original part?providing safety, efficiency, and peace of mind for your York furnace system,