Description
The York S1-025-26366-004 is an OEM replacement L195-65F Fan & Limit Control engineered for York furnaces. This bimetal-actuated control performs two critical functions in a forced-air heating system: it sequences the blower motor on and off based on plenum temperature, and it provides a high-limit safety shutoff to protect the heat exchanger from overheating.
How It Works
The “L195” designation indicates a high-limit trip point of 195°F — if plenum temperatures reach this threshold, the control interrupts the burner circuit to prevent heat exchanger damage. The “65F” differential governs fan operation: the blower is energized once the plenum reaches the fan-on setpoint and de-energized when temperatures fall back to the fan-off setpoint, ensuring efficient warm-air delivery and preventing cold-air drafts at startup and shutdown.
Key Features
- OEM York replacement part — direct fit for compatible York furnace models
- 195°F high-limit safety cutout protects the heat exchanger from overheating
- 65°F fan differential for precise blower on/off sequencing
- Bimetal sensing element for reliable, repeatable temperature response
- Interrupts burner circuit on over-temperature condition for system protection
- Manages blower operation to deliver warm air efficiently and prevent cold drafts
- Durable construction built to York OEM specifications
Application
Designed as a direct OEM replacement for York forced-air furnaces. Always verify compatibility with your specific furnace model number before installation. Installation should be performed by a qualified HVAC technician in accordance with local codes and the equipment manufacturer’s guidelines.
Specifications
- Part Number: S1-025-26366-004
- Control Type: Fan & Limit Control
- Model Designation: L195-65F
- High Limit Setpoint: 195°F
- Fan Differential: 65°F
- Brand: York (OEM)









