Lennox 36K30 - (R40154B021) Control-Limit
Ensure dependable protection and safe operation of your HVAC system with the Lennox 36K30 (R40154B021) Control-Limit. Designed specifically for Lennox equipment, this high-quality temperature limit control plays a critical role in maintaining system safety by interrupting electrical flow when operating temperatures exceed preset limits.
Key Features:
- OEM Quality: Manufactured to strict Lennox specifications for consistent and reliable performance.
- Precise Temperature Regulation: Monitors internal system temperatures and helps prevent overheating conditions.
- Automatic Reset Function: Restores normal operation automatically once the system cools to safe levels.
- Durable Construction: Built to withstand the demands of continuous HVAC system cycling.
Application:
The 36K30 control-limit switch is typically used in gas furnaces and air handlers to enhance safety and protect components such as heat exchangers, blower motors, and electrical circuits from thermal damage. It ensures your system shuts down before reaching unsafe temperatures, helping to prolong equipment life and maintain compliance with safety standards.
Specifications:
- Part Number: 36K30
- Manufacturer Number: R40154B021
- Type: Limit Control
- Function: High-temperature protection with auto-reset
This OEM Lennox limit control is a direct-fit replacement, ensuring seamless compatibility and easy installation with select Lennox models.
Maintain system integrity and operational safety — choose the Lennox 36K30 Control-Limit for reliable thermal protection.
Available now at Beenimax.com. Order today to ensure your Lennox system runs safely and efficiently.

