Lennox 22B74 Limit Switch 195°F Overview
The Lennox 22B74 is an OEM-grade high-limit switch engineered to protect furnaces and heating systems from dangerous overheating conditions. Rated at a 195°F trip temperature, this limit switch monitors heat exchanger temperatures and automatically interrupts the burner circuit when temperatures exceed the safe operating threshold — helping prevent equipment damage, system failure, and potential fire hazards.
Key Features
- 195°F trip temperature for precise high-limit protection
- Direct OEM replacement for compatible Lennox furnace models
- Automatically shuts down burner operation upon detecting excess heat
- Helps protect heat exchangers and internal furnace components
- Designed for reliable, long-service-life performance in residential and light commercial applications
- Easy drop-in installation for qualified HVAC technicians
Application
The Lennox 22B74 limit switch is a critical safety component used in Lennox furnaces and air handlers. It is designed to sense abnormal temperature rises within the heat exchanger compartment and cut power to the burner before damage occurs. Always verify compatibility with your specific Lennox equipment model before installation.
Specifications
- Brand: Lennox
- Part Number: 22B74
- Type: High-Limit Switch
- Trip Temperature: 195°F
- Application: Furnace / Heating System Safety Control
