Description
Lennox 11W52 L240-30F Limit Switch Overview
The Lennox 11W52 is a genuine OEM high-limit switch designed to protect furnaces and heating systems from overheating conditions. Carrying the model designation L240-30F, this limit switch is engineered to open the control circuit when supply-air temperatures reach a dangerous threshold, shutting down the burner and preventing heat exchanger damage or fire hazards. It is a direct-fit replacement for compatible Lennox furnace models, ensuring reliable, code-compliant operation.
Key Specifications
- Part Number: 11W52
- Model: L240-30F
- Open (Trip) Temperature: 240°F
- Differential: 30°F (resets at approximately 210°F)
- Type: Manual or automatic reset high-limit switch (OEM spec)
- Brand: Lennox (Genuine OEM Replacement Part)
Features & Benefits
- Genuine Lennox OEM part — ensures proper fit and performance in compatible Lennox furnace systems
- 240°F trip point provides reliable over-temperature protection for heat exchangers and ductwork
- 30°F differential allows the system to cool sufficiently before resetting, preventing nuisance short-cycling
- Helps protect against heat exchanger cracking, component damage, and potential fire hazards
- Direct drop-in replacement — no modification required for compatible Lennox applications
- Supports safe, efficient furnace operation and extends equipment service life
Application
The Lennox 11W52 L240-30F Limit Switch is intended for use in Lennox gas furnaces and heating systems requiring a high-limit safety control. Always verify compatibility with your specific furnace model before installation. Refer to the equipment service manual for wiring diagrams and mounting instructions.
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