Description
The York S1-025-26366-003 is a genuine OEM auto-reset high-limit switch designed to protect York furnaces and heating systems from dangerous overheating conditions. When supply air temperatures exceed the rated threshold, this limit switch interrupts the burner circuit and automatically resets once temperatures return to a safe operating level — providing reliable, hands-free protection without requiring manual intervention.
Key Features
- Genuine York OEM replacement part — ensures proper fit and function
- Auto-reset operation — automatically restores normal furnace operation once temperatures normalize
- Temperature range: 110°F to 170°F
- Protects heat exchanger and system components from thermal damage
- Direct drop-in replacement for compatible York heating systems
- Helps maintain system efficiency and extend equipment life
How It Works
The limit switch continuously monitors the air temperature within the furnace plenum or heat exchanger area. If temperatures rise above the set point — indicating restricted airflow, a dirty filter, or another fault condition — the switch opens the burner circuit to prevent overheating. Once the system cools to a safe temperature, the auto-reset mechanism closes the circuit and normal operation resumes.
Application
- Compatible with select York residential and light commercial furnaces
- Ideal for service technicians performing OEM-quality repairs
- Recommended replacement when the existing limit switch fails to open, fails to reset, or causes nuisance lockouts
Product Specifications
- Brand: York
- Part Number: S1-025-26366-003
- Type: Auto-Reset High Limit Switch
- Temperature Range: 110°F – 170°F
- Reset Type: Automatic (AUTO)
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