Lennox 97J67 Limit Switch
The Lennox 97J67 limit switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Featuring a 110-140F temperature range, this automatic reset limit switch monitors internal plenum temperatures to prevent heat exchanger damage or unsafe operating conditions. When the high-limit threshold of 140°F is reached, the switch opens the electrical circuit to shut down burners, automatically closing once the system cools to 110°F. As a genuine Lennox OEM replacement part, it ensures exact fitment and maintains the UL certification of the original equipment, offering superior reliability compared to generic alternatives during high-cycle demands.
Key Benefits
- Precision Thermal Calibration: Factory-set to Lennox 97J67 specifications to ensure accurate 140-degree cutout and 110-degree cut-in points.
- Automatic Reset Logic: Eliminates the need for manual intervention after a temporary overheat condition, restoring system operation once safe temperatures are reached.
- High-Temperature Durability: Constructed with robust bimetal sensing elements and ceramic housing to withstand the rigors of frequent thermal cycling in HVAC furnace limit control applications.
- Direct Compatibility: Engineered for seamless integration into Lennox G24, G26, and G32 series units, ensuring electrical connectors and mounting footprints align perfectly.
Common Questions
What causes a Lennox 97J67 limit switch to trip frequently?
Technicians typically find that restricted airflow—caused by a dirty furnace filter, blocked return air vents, or a failing blower motor—is the primary reason for the switch exceeding the 140°F limit.
Can this limit switch be used in 24V and 120V circuits?
Yes, this universal HVAC limit switch is rated for use in both low-voltage control circuits and line-voltage applications, provided the amperage draw does not exceed the OEM rating.
How do I verify if the 97J67 is the correct part for my unit?
Reference the furnace data plate. This switch is common in Lennox and Armstrong units where the 110-140F L140-30 designation is required for safety compliance.
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: $21.07
-65%$21.07
$7.37Lennox 97J67 Limit Switch
The Lennox 97J67 limit switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Featuring a 110-140F temperature range, this automatic reset limit switch monitors internal plenum temperatures to prevent heat exchanger damage or unsafe operating conditions. When the high-limit threshold of 140°F is reached, the switch opens the electrical circuit to shut down burners, automatically closing once the system cools to 110°F. As a genuine Lennox OEM replacement part, it ensures exact fitment and maintains the UL certification of the original equipment, offering superior reliability compared to generic alternatives during high-cycle demands.
Key Benefits
- Precision Thermal Calibration: Factory-set to Lennox 97J67 specifications to ensure accurate 140-degree cutout and 110-degree cut-in points.
- Automatic Reset Logic: Eliminates the need for manual intervention after a temporary overheat condition, restoring system operation once safe temperatures are reached.
- High-Temperature Durability: Constructed with robust bimetal sensing elements and ceramic housing to withstand the rigors of frequent thermal cycling in HVAC furnace limit control applications.
- Direct Compatibility: Engineered for seamless integration into Lennox G24, G26, and G32 series units, ensuring electrical connectors and mounting footprints align perfectly.
Common Questions
What causes a Lennox 97J67 limit switch to trip frequently?
Technicians typically find that restricted airflow—caused by a dirty furnace filter, blocked return air vents, or a failing blower motor—is the primary reason for the switch exceeding the 140°F limit.
Can this limit switch be used in 24V and 120V circuits?
Yes, this universal HVAC limit switch is rated for use in both low-voltage control circuits and line-voltage applications, provided the amperage draw does not exceed the OEM rating.
How do I verify if the 97J67 is the correct part for my unit?
Reference the furnace data plate. This switch is common in Lennox and Armstrong units where the 110-140F L140-30 designation is required for safety compliance.
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 97J67 limit switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Featuring a 110-140F temperature range, this automatic reset limit switch monitors internal plenum temperatures to prevent heat exchanger damage or unsafe operating conditions. When the high-limit threshold of 140°F is reached, the switch opens the electrical circuit to shut down burners, automatically closing once the system cools to 110°F. As a genuine Lennox OEM replacement part, it ensures exact fitment and maintains the UL certification of the original equipment, offering superior reliability compared to generic alternatives during high-cycle demands.
Key Benefits
- Precision Thermal Calibration: Factory-set to Lennox 97J67 specifications to ensure accurate 140-degree cutout and 110-degree cut-in points.
- Automatic Reset Logic: Eliminates the need for manual intervention after a temporary overheat condition, restoring system operation once safe temperatures are reached.
- High-Temperature Durability: Constructed with robust bimetal sensing elements and ceramic housing to withstand the rigors of frequent thermal cycling in HVAC furnace limit control applications.
- Direct Compatibility: Engineered for seamless integration into Lennox G24, G26, and G32 series units, ensuring electrical connectors and mounting footprints align perfectly.
Common Questions
What causes a Lennox 97J67 limit switch to trip frequently?
Technicians typically find that restricted airflow—caused by a dirty furnace filter, blocked return air vents, or a failing blower motor—is the primary reason for the switch exceeding the 140°F limit.
Can this limit switch be used in 24V and 120V circuits?
Yes, this universal HVAC limit switch is rated for use in both low-voltage control circuits and line-voltage applications, provided the amperage draw does not exceed the OEM rating.
How do I verify if the 97J67 is the correct part for my unit?
Reference the furnace data plate. This switch is common in Lennox and Armstrong units where the 110-140F L140-30 designation is required for safety compliance.
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.
