Description
The Bard HVAC 8402-033BX is a genuine OEM L140-25F limit switch engineered for use in Bard heating and HVAC equipment. Limit switches are critical safety components that monitor air temperature within the heat exchanger or supply air plenum, automatically shutting down the burner or heating element if temperatures exceed a safe threshold — protecting your equipment from damage and preventing potential hazards.
How It Works
This L140-25F limit switch is a temperature-actuated safety device. The “L140” designation indicates the switch opens (trips) at 140°F, interrupting the heating circuit when air temperatures reach unsafe levels. The “25F” differential means the switch automatically resets and closes once the temperature drops 25°F, restoring normal operation at approximately 115°F. This automatic reset behavior ensures reliable, hands-free recovery once safe operating temperatures are restored.
Key Features
- OEM Bard HVAC replacement part — direct-fit for compatible Bard equipment
- Opens (trips) at 140°F to protect against overheating
- 25°F differential — automatically resets at approximately 115°F
- Provides critical overheat protection for heating systems
- Helps prevent heat exchanger damage and fire risk
- Designed for dependable, long-service-life performance in commercial and residential HVAC applications
Application
This limit switch is intended as a direct OEM replacement for Bard HVAC systems requiring the L140-25F specification. Always verify compatibility with your specific Bard unit model before installation. Replacement should be performed by a qualified HVAC technician in accordance with local codes and manufacturer guidelines.
