Description
The Lennox 56W22 is an automatic (AUTO) reset high-limit switch engineered to protect furnaces and heating systems from dangerous overtemperature conditions. With a 135°F set point and a 165°F cutout temperature, this limit switch continuously monitors heat exchanger temperatures and automatically interrupts the burner circuit when unsafe temperatures are detected — then resets automatically once temperatures return to the safe operating range.
Key Features
- AUTO (automatic) reset operation — no manual intervention required after safe temperatures are restored
- 135°F set point / 165°F cutout temperature range for precise overheat protection
- Direct OEM replacement for compatible Lennox furnace models
- Protects heat exchanger and furnace components from thermal damage
- Reliable bimetal sensing element for consistent, repeatable performance
- Designed for straightforward installation in existing limit switch mounting locations
Product Specifications
- Brand: Lennox
- Part Number: 56W22
- Switch Type: AUTO Reset Limit Switch
- Set Point Temperature: 135°F
- Cutout Temperature: 165°F
- Application: Furnace Overheat Protection
Application
The Lennox 56W22 limit switch is a critical safety component in gas and oil furnaces, preventing overheating that can lead to heat exchanger damage, equipment failure, or fire hazards. Its automatic reset feature makes it ideal for installations where nuisance service calls for manual resets are undesirable. Always verify compatibility with your specific Lennox furnace model before installation.
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