Description
Lennox 46K72 Auto Reset Limit Switch Overview
The Lennox 46K72 is an OEM auto reset limit switch designed to protect furnace heat exchangers and associated components from dangerous overheating conditions. With a temperature range of 220–250°F, this limit switch automatically resets once temperatures return to a safe operating level, minimizing system downtime and reducing the need for manual intervention.
Key Features
- Auto reset operation — automatically restores system function once safe temperatures are reached
- Temperature rating: 220–250°F operating range
- OEM Lennox replacement part — engineered for precise fit and reliable performance in compatible Lennox furnace systems
- Provides critical high-limit protection to prevent heat exchanger damage and potential safety hazards
- Durable construction for long service life in demanding HVAC applications
Application
The 46K72 limit switch is a direct OEM replacement for compatible Lennox furnace models. It monitors supply air or heat exchanger temperatures and interrupts the burner circuit if temperatures exceed the rated threshold, safeguarding equipment and occupants. The auto reset function restores normal operation automatically after the unit cools down, making it ideal for residential and light commercial heating systems.
Specifications
- Brand: Lennox
- Part Number: 46K72
- Switch Type: Auto Reset Limit Switch
- Temperature Range: 220–250°F
- Application: Furnace high-limit protection
