The York A1905 Limit Switch (36T01B3, 44698) is an auto-reset temperature control switch designed for York furnaces and HVAC units. It plays a vital safety role by interrupting power when internal temperatures reach 150F, automatically resetting once the temperature drops to 120F. This ensures efficient heating system protection against overheating while maintaining consistent operation. Key Features: Genuine York OEM replacement for reliable performance. Automatic reset function?opens at 150F and closes at 120F. Ensures safe furnace operation by preventing overheating. Compact disc design with quick thermal response. Constructed from heat-resistant materials for durability and precision. Specifications: Part Numbers: A1905, 44698, 36T01B3 Function: Limit Switch / Temperature Disc Operation: Automatic Reset Open Temperature: 150F Close Temperature: 120F Application: Gas furnace / HVAC thermal protection Compatible Models: D1NA042N03658 D1NH036N03658 D1NH036N03646 P3DHC20N09501 B3HP042A06 1LD0407 AHP36C4GH21 AM018MA322 AHX36C3XH21 2HG04700724 B1HH042A46FE B4CH048A25 ACP060G0801221 ACZ036G0901343 ACZ048G0801325 ACP048G1101221 AL8B036F1 6MG19 and more. Why Choose This Item: The York A1905 (36T01B3) Limit Switch offers dependable, automatic temperature control to protect your furnace from excessive heat. As an authentic OEM component, it provides accurate thermal cutoff and reset behavior, ensuring your York system operates safely and efficiently for years.