Lennox 46K73 Limit Switch

The Lennox 46K73 Limit Switch is a critical safety component designed for precise thermal regulation within high-performance HVAC systems. Engineered as a 200-230F Auto Limit Switch, this genuine OEM part monitors internal temperatures and interrupts the heating circuit if values exceed safe operating parameters, effectively preventing equipment damage. This specific model, also identified by part number 46K7301, features an auto-reset function that restores operation once the sensor cools, minimizing system downtime for your clients. Whether you are performing a furnace repair or servicing a Lennox packaged unit, this switch ensures the heat exchanger remains within its designed thermal profile. Verified for compatibility with various Lennox RTU and residential furnace models, this switch is the industry standard for maintaining consistent HVAC safety limit performance. Its robust construction and 1/8-inch terminal connections facilitate a reliable fit for technicians requiring rapid, high-accuracy replacements.

Key Benefits:

• Precise Thermal Protection: Operates within a 200-230 degree Fahrenheit range to protect the heat exchanger from overheating.
• OEM Compatibility: This genuine Lennox replacement part is identical to the 46K7301 and fits a wide array of Lennox heating equipment.
• Automatic Reset Logic: Eliminates the need for manual intervention by automatically resetting the circuit once temperatures return to safe levels.
• Reliable HVAC Performance: Built to rigorous industry standards to prevent common issues like furnace short cycling or blower motor malfunctions.

Common Questions:

• Is the 46K73 compatible with the 46K7301? Yes, these part numbers are identical and interchangeable for all Lennox applications.
• What happens if my furnace limit switch stays open? An open limit switch will typically cause the indoor blower to run continuously while preventing the burners from firing to ensure safety.
• How do I know if this 230F switch is the right range for my unit? You should always verify the temperature stamp on the existing switch or consult the unit’s wiring diagram to match the required 200-230F range.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.