Lennox 18H01 Limit Switch
The Lennox 18H01 Limit Switch is a high-precision OEM replacement part engineered for critical thermal protection in heating and air conditioning systems. This specific L140-40F limit control is designed to monitor internal temperatures with an auto-reset function, automatically breaking the electrical circuit if temperatures exceed the 140°F threshold and restoring operation once conditions drop to 100°F. Built with a rugged housing to withstand the high-vibration environment of industrial and residential air handlers, this switch ensures the integrity of the heat exchanger and prevents hazardous overheating.
As a veteran technician, you know that using a 100% genuine Lennox part is non-negotiable for maintaining equipment performance and exact fitment. The 18H01 is a common point of service for furnace troubleshooting when the system cycles improperly or fails to initiate. This component features high-precision contacts and a compact design, making it compatible with various Lennox furnaces and ECB29 series electric heat sections. Proper installation of this HVAC safety switch is vital for protecting the primary controller and preventing costly compressor or blower motor failures.
Key Benefits for Technicians:- Automatic Reset Logic: Features a fixed L140-40F setting, reducing manual resets and ensuring the system returns to operation safely after a temporary thermal event.
- Exact OEM Compatibility: Designed for a seamless drop-in fit for Lennox ECB29 and ECH16 series units, eliminating the need for field modifications.
- Durable Construction: Engineered with a vibration-resistant housing and precision-machined contacts to handle the arcing and mechanical stress of frequent cycling.
- System Safeguard: Acts as a primary furnace limit control, preventing structural damage to the heating cabinet during restricted airflow or gas pressure issues.
What are the temperature ratings for the 18H01?
This switch is rated as an L140-40F, meaning it opens the circuit at 140°F and closes it (resets) after a 40°F temperature drop, typically around 100°F.
Is the 18H01 compatible with other HVAC brands?
While functionally similar to other limit switches, the 18H01 is a Lennox 18H0101 specific design, ensuring the bracketry and electrical terminals align perfectly within Lennox-manufactured equipment.
What causes this limit switch to trip frequently?
In most HVAC applications, frequent 18H01 trips are caused by restricted airflow, such as dirty filters, blocked returns, or a failing indoor blower motor.
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.
Original: $31.71
-65%$31.71
$11.10Lennox 18H01 Limit Switch
The Lennox 18H01 Limit Switch is a high-precision OEM replacement part engineered for critical thermal protection in heating and air conditioning systems. This specific L140-40F limit control is designed to monitor internal temperatures with an auto-reset function, automatically breaking the electrical circuit if temperatures exceed the 140°F threshold and restoring operation once conditions drop to 100°F. Built with a rugged housing to withstand the high-vibration environment of industrial and residential air handlers, this switch ensures the integrity of the heat exchanger and prevents hazardous overheating.
As a veteran technician, you know that using a 100% genuine Lennox part is non-negotiable for maintaining equipment performance and exact fitment. The 18H01 is a common point of service for furnace troubleshooting when the system cycles improperly or fails to initiate. This component features high-precision contacts and a compact design, making it compatible with various Lennox furnaces and ECB29 series electric heat sections. Proper installation of this HVAC safety switch is vital for protecting the primary controller and preventing costly compressor or blower motor failures.
Key Benefits for Technicians:- Automatic Reset Logic: Features a fixed L140-40F setting, reducing manual resets and ensuring the system returns to operation safely after a temporary thermal event.
- Exact OEM Compatibility: Designed for a seamless drop-in fit for Lennox ECB29 and ECH16 series units, eliminating the need for field modifications.
- Durable Construction: Engineered with a vibration-resistant housing and precision-machined contacts to handle the arcing and mechanical stress of frequent cycling.
- System Safeguard: Acts as a primary furnace limit control, preventing structural damage to the heating cabinet during restricted airflow or gas pressure issues.
What are the temperature ratings for the 18H01?
This switch is rated as an L140-40F, meaning it opens the circuit at 140°F and closes it (resets) after a 40°F temperature drop, typically around 100°F.
Is the 18H01 compatible with other HVAC brands?
While functionally similar to other limit switches, the 18H01 is a Lennox 18H0101 specific design, ensuring the bracketry and electrical terminals align perfectly within Lennox-manufactured equipment.
What causes this limit switch to trip frequently?
In most HVAC applications, frequent 18H01 trips are caused by restricted airflow, such as dirty filters, blocked returns, or a failing indoor blower motor.
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.
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Description
The Lennox 18H01 Limit Switch is a high-precision OEM replacement part engineered for critical thermal protection in heating and air conditioning systems. This specific L140-40F limit control is designed to monitor internal temperatures with an auto-reset function, automatically breaking the electrical circuit if temperatures exceed the 140°F threshold and restoring operation once conditions drop to 100°F. Built with a rugged housing to withstand the high-vibration environment of industrial and residential air handlers, this switch ensures the integrity of the heat exchanger and prevents hazardous overheating.
As a veteran technician, you know that using a 100% genuine Lennox part is non-negotiable for maintaining equipment performance and exact fitment. The 18H01 is a common point of service for furnace troubleshooting when the system cycles improperly or fails to initiate. This component features high-precision contacts and a compact design, making it compatible with various Lennox furnaces and ECB29 series electric heat sections. Proper installation of this HVAC safety switch is vital for protecting the primary controller and preventing costly compressor or blower motor failures.
Key Benefits for Technicians:- Automatic Reset Logic: Features a fixed L140-40F setting, reducing manual resets and ensuring the system returns to operation safely after a temporary thermal event.
- Exact OEM Compatibility: Designed for a seamless drop-in fit for Lennox ECB29 and ECH16 series units, eliminating the need for field modifications.
- Durable Construction: Engineered with a vibration-resistant housing and precision-machined contacts to handle the arcing and mechanical stress of frequent cycling.
- System Safeguard: Acts as a primary furnace limit control, preventing structural damage to the heating cabinet during restricted airflow or gas pressure issues.
What are the temperature ratings for the 18H01?
This switch is rated as an L140-40F, meaning it opens the circuit at 140°F and closes it (resets) after a 40°F temperature drop, typically around 100°F.
Is the 18H01 compatible with other HVAC brands?
While functionally similar to other limit switches, the 18H01 is a Lennox 18H0101 specific design, ensuring the bracketry and electrical terminals align perfectly within Lennox-manufactured equipment.
What causes this limit switch to trip frequently?
In most HVAC applications, frequent 18H01 trips are caused by restricted airflow, such as dirty filters, blocked returns, or a failing indoor blower motor.
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.
