Lennox 69W40 Limit Control
The Lennox 69W40 Limit Control is a critical safety component designed for high-temperature monitoring in residential and commercial heating systems. This fixed temperature limit switch features a 205-degree Fahrenheit (205F) trip point, ensuring the system shuts down immediately if internal temperatures exceed safe operational parameters. Engineered as an authentic Lennox replacement part, this high limit safety switch utilizes a reliable bimetallic disc mechanism for precise thermal detection. It is commonly found in specific furnace models to prevent heat exchanger damage and ensure fire safety. As an OEM HVAC part, the 69W40 provides exact fitment and electrical compatibility, maintaining the appliance's original safety certification. This L120-25F manual reset limit or automatic equivalent is essential for contractors performing furnace limit switch troubleshooting or preventative maintenance on aging Lennox units.
Key Benefits
- Precise 205F Cut-out: Calibrated for accurate high-temperature protection to prevent equipment overheating.
- OEM Compatibility: Replaces Lennox 69W40 and 100418-05 without modifying wiring or mounting brackets.
- Industrial Durability: Built with high-grade materials to withstand the thermal cycling typical of modern high-efficiency furnaces.
- Reliable Safety Interface: Seamlessly integrates with the furnace control board to interrupt the 24V circuit upon limit trip.
Common Questions
How do I know if my furnace limit switch is bad?
If the indoor blower runs continuously while the burners fail to ignite, or if you measure an open circuit across the terminals at room temperature, the limit control typically needs replacement.
What causes a 205F limit control to trip frequently?
Frequent tripping is usually indicative of restricted airflow, often caused by a dirty air filter, blocked return vents, or a failing blower motor rather than a faulty switch.
Is the 69W40 a manual or automatic reset?
The 69W40 is designed to operate based on the specific thermal logic of the furnace control board; always verify the reset type against the existing part number on the job site.
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: $25.18
-65%$25.18
$8.81Lennox 69W40 Limit Control
The Lennox 69W40 Limit Control is a critical safety component designed for high-temperature monitoring in residential and commercial heating systems. This fixed temperature limit switch features a 205-degree Fahrenheit (205F) trip point, ensuring the system shuts down immediately if internal temperatures exceed safe operational parameters. Engineered as an authentic Lennox replacement part, this high limit safety switch utilizes a reliable bimetallic disc mechanism for precise thermal detection. It is commonly found in specific furnace models to prevent heat exchanger damage and ensure fire safety. As an OEM HVAC part, the 69W40 provides exact fitment and electrical compatibility, maintaining the appliance's original safety certification. This L120-25F manual reset limit or automatic equivalent is essential for contractors performing furnace limit switch troubleshooting or preventative maintenance on aging Lennox units.
Key Benefits
- Precise 205F Cut-out: Calibrated for accurate high-temperature protection to prevent equipment overheating.
- OEM Compatibility: Replaces Lennox 69W40 and 100418-05 without modifying wiring or mounting brackets.
- Industrial Durability: Built with high-grade materials to withstand the thermal cycling typical of modern high-efficiency furnaces.
- Reliable Safety Interface: Seamlessly integrates with the furnace control board to interrupt the 24V circuit upon limit trip.
Common Questions
How do I know if my furnace limit switch is bad?
If the indoor blower runs continuously while the burners fail to ignite, or if you measure an open circuit across the terminals at room temperature, the limit control typically needs replacement.
What causes a 205F limit control to trip frequently?
Frequent tripping is usually indicative of restricted airflow, often caused by a dirty air filter, blocked return vents, or a failing blower motor rather than a faulty switch.
Is the 69W40 a manual or automatic reset?
The 69W40 is designed to operate based on the specific thermal logic of the furnace control board; always verify the reset type against the existing part number on the job site.
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.
Product Information
Product Information
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Description
The Lennox 69W40 Limit Control is a critical safety component designed for high-temperature monitoring in residential and commercial heating systems. This fixed temperature limit switch features a 205-degree Fahrenheit (205F) trip point, ensuring the system shuts down immediately if internal temperatures exceed safe operational parameters. Engineered as an authentic Lennox replacement part, this high limit safety switch utilizes a reliable bimetallic disc mechanism for precise thermal detection. It is commonly found in specific furnace models to prevent heat exchanger damage and ensure fire safety. As an OEM HVAC part, the 69W40 provides exact fitment and electrical compatibility, maintaining the appliance's original safety certification. This L120-25F manual reset limit or automatic equivalent is essential for contractors performing furnace limit switch troubleshooting or preventative maintenance on aging Lennox units.
Key Benefits
- Precise 205F Cut-out: Calibrated for accurate high-temperature protection to prevent equipment overheating.
- OEM Compatibility: Replaces Lennox 69W40 and 100418-05 without modifying wiring or mounting brackets.
- Industrial Durability: Built with high-grade materials to withstand the thermal cycling typical of modern high-efficiency furnaces.
- Reliable Safety Interface: Seamlessly integrates with the furnace control board to interrupt the 24V circuit upon limit trip.
Common Questions
How do I know if my furnace limit switch is bad?
If the indoor blower runs continuously while the burners fail to ignite, or if you measure an open circuit across the terminals at room temperature, the limit control typically needs replacement.
What causes a 205F limit control to trip frequently?
Frequent tripping is usually indicative of restricted airflow, often caused by a dirty air filter, blocked return vents, or a failing blower motor rather than a faulty switch.
Is the 69W40 a manual or automatic reset?
The 69W40 is designed to operate based on the specific thermal logic of the furnace control board; always verify the reset type against the existing part number on the job site.
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.
