The York 65978 (2302R, 1NT23L-3150) Limit Switch/Thermostat is a high-precision temperature control component designed to protect heating systems from overheating. Featuring a 5-inch insertion probe and rated at L240F-30, this limit switch opens at 240F and resets automatically at 210F, ensuring reliable temperature regulation. Built to York OEM standards, it guarantees accurate performance, safe operation, and extended service life in furnaces and heating units. Key Features Genuine York OEM component ? ensures proper system compatibility 5" insertion length for accurate temperature sensing Opens at 240F, closes at 210F (L240F-30 rating) Provides automatic temperature control and system protection Durable construction for consistent, long-term performance Essential for preventing furnace overheating and ensuring safety Specifications Part Numbers: 65978 / 2302R / 1NT23L-3150 Type: Limit Switch / Thermostat Insert Length: 5 inches Temperature Rating: L240F-30 (Opens at 240F, Closes at 210F) Manufacturer: York (OEM) Compatible Models: AC6B048F3C, AHE60D3XT21, D1NY024N03606, D1NY060N09006NX, D1EQ036A25, D2EB036A25, D2NP042D09046, D8CG060N07946EC, and more. Why Choose This Item Choose the York 65978 (1NT23L-3150) Limit Switch to maintain safe and efficient furnace operation. Its precise temperature control and OEM-grade reliability help prevent overheating and system failures, ensuring consistent heating performance and peace of mind for both residential and commercial HVAC systems.