Honeywell L4064B2236 Fan and Limit Control, 8inch Insertion

Original price was: $171.89.Current price is: $129.72.

11 in stock

SKU: 38083 Category:


The Honeywell L4064B2236 Fan and Limit Control is a versatile component for managing airflow and temperature in forced-air heating systems. Here’s a breakdown of its functions and features:


  • Controls both the fan and high-limit switch:
    • Fan control: Turns the furnace fan on and off based on system demand and thermostat settings. This ensures proper air circulation for heating and prevents unnecessary fan operation.
    • High-limit switch: Disconnects the power supply to the furnace if the plenum temperature exceeds a safe threshold, protecting the system from overheating.
  • Adapts to various mounting configurations: Fits in furnace openings designed for previous L4064 series controls, simplifying replacement.
  • Offers multiple fan and limit settings: Provides flexibility for optimal performance in different furnace models and applications.

Key Features:

  • Plenum-mount design: Easy to install in the air duct plenum of the furnace.
  • Single-element combination: Combines fan and limit switch functions in one compact unit, saving space and simplifying troubleshooting.
  • Field-addable screw terminals: Allow for convenient wiring adjustments during installation.
  • Strain relief bushing: Protects wiring from accidental damage.
  • UL listed: Ensures compliance with safety standards.


  • Forced-air furnaces (gas, oil, electric)
  • Residential and light commercial HVAC systems

Things to Consider:

  • Compatibility: Verify that the control’s fan and limit settings match the requirements of your specific furnace model.
  • Professional installation recommended: While DIY installation is possible, consulting a qualified HVAC technician is recommended for optimal performance and safety, especially when dealing with electrical connections and furnace operations.
  • Replacement: If the existing control is malfunctioning, replacing it with the L4064B2236 can restore proper fan and temperature control in your furnace.

Overall, the Honeywell L4064B2236 Fan and Limit Control is a reliable and versatile option for managing fan operation and preventing overheating in forced-air heating systems. Its adaptability, multiple settings, and compact design make it a popular choice for both homeowners and technicians.

Additional information

Weight 1.66 lbs


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