The York 025-36312-000 is an OEM replacement limit switch engineered to protect York heating systems from dangerous overtemperature conditions. Designed to open the circuit at 140°F and reset (close) at 30°F, this limit switch serves as a critical safety device that shuts down burner operation before heat exchanger temperatures reach damaging levels.
How It Works
The limit switch continuously monitors the air temperature within the furnace plenum or heat exchanger area. When the sensed temperature rises to the 140°F open setpoint — caused by restricted airflow, a dirty filter, or a blocked register — the switch opens the control circuit and interrupts burner operation. Once temperatures fall back to the 30°F differential reset point, the switch closes and normal heating operation can resume.
Key Features
- OEM York replacement part — direct fit for compatible York furnace models
- Opens at 140°F to protect against overheating
- Closes (resets) at 30°F differential setpoint
- Acts as a primary safety control to prevent heat exchanger damage
- Helps safeguard against fire hazards caused by excessive plenum temperatures
- Part Number: 025-36312-000
Applications
- York gas furnaces requiring OEM limit switch replacement
- Residential and light commercial heating systems
- Installations requiring precise overtemperature protection
Installation Notes
Always verify compatibility with your specific York furnace model before installation. Disconnect power to the unit before servicing. Refer to the equipment service manual for proper mounting location, wiring, and torque specifications. Replacement of a limit switch that has tripped repeatedly may indicate an underlying airflow or combustion issue that should be diagnosed and corrected.
