
Lennox 71L45 Gasket
The Lennox 71L45 is a critical Flue Collector Box Gasket designed to maintain the structural integrity of the combustion path in high-efficiency furnace repair applications. This high-temperature sealing component is engineered to eliminate exhaust gas bypass by creating a gas-tight seal between the flue collector box and the heat exchanger interface. For technicians, ensuring a zero-leak seal is essential to prevent CO leakage and maintain proper static pressure within the combustion assembly. Constructed from durable, chemically resistant material, the Lennox 71L45 Gasket withstands the extreme thermal cycling and corrosive condensate typical of HVAC replacement parts in residential heating systems. Precision-cut for an exact OEM fit, this gasket facilitates a faster installation during flue box maintenance compared to generic RTV alternatives. When diagnosing fluctuating pressure switch readings or moisture around the collector box, replacing the Lennox 71L45 is the standard protocol to restore system efficiency and ensure safe operation for your clients. This part is a direct OEM furnace gasket replacement, ensuring full compatibility with specified Lennox series heating units.
Key Benefits- Gas-Tight Seal: Prevents combustion byproduct leakage into the cabinet, ensuring technician and occupant safety.
- High-Temperature Resistance: Engineered to maintain flexibility and sealing force under consistent thermal stress.
- OEM Precision: Eliminates the need for manual trimming, reducing labor time during furnace gasket replacement.
- Corrosion Resistance: Formulated to resist the acidic nature of furnace condensate found in high-efficiency flue systems.
What are the signs of a failing flue collector box gasket?
Technicians typically look for visible white or rusty streaks (condensate residue) around the flue collector box, erratic pressure switch trips, or flue gas odors during the startup sequence.
Can I use high-temp RTV instead of the Lennox 71L45?
While RTV can be used in emergencies, the 71L45 provides a uniform thickness and compression set that is difficult to replicate with sealant, ensuring a more reliable long-term seal for Lennox HVAC equipment.
Is this gasket compatible with all Lennox furnaces?
This gasket is specifically designed for Lennox flue collector boxes. Always verify your specific model and serial number to ensure exact fitment for the combustion assembly you are servicing.
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: $32.13
-65%$32.13
$11.25Lennox 71L45 Gasket
The Lennox 71L45 is a critical Flue Collector Box Gasket designed to maintain the structural integrity of the combustion path in high-efficiency furnace repair applications. This high-temperature sealing component is engineered to eliminate exhaust gas bypass by creating a gas-tight seal between the flue collector box and the heat exchanger interface. For technicians, ensuring a zero-leak seal is essential to prevent CO leakage and maintain proper static pressure within the combustion assembly. Constructed from durable, chemically resistant material, the Lennox 71L45 Gasket withstands the extreme thermal cycling and corrosive condensate typical of HVAC replacement parts in residential heating systems. Precision-cut for an exact OEM fit, this gasket facilitates a faster installation during flue box maintenance compared to generic RTV alternatives. When diagnosing fluctuating pressure switch readings or moisture around the collector box, replacing the Lennox 71L45 is the standard protocol to restore system efficiency and ensure safe operation for your clients. This part is a direct OEM furnace gasket replacement, ensuring full compatibility with specified Lennox series heating units.
Key Benefits- Gas-Tight Seal: Prevents combustion byproduct leakage into the cabinet, ensuring technician and occupant safety.
- High-Temperature Resistance: Engineered to maintain flexibility and sealing force under consistent thermal stress.
- OEM Precision: Eliminates the need for manual trimming, reducing labor time during furnace gasket replacement.
- Corrosion Resistance: Formulated to resist the acidic nature of furnace condensate found in high-efficiency flue systems.
What are the signs of a failing flue collector box gasket?
Technicians typically look for visible white or rusty streaks (condensate residue) around the flue collector box, erratic pressure switch trips, or flue gas odors during the startup sequence.
Can I use high-temp RTV instead of the Lennox 71L45?
While RTV can be used in emergencies, the 71L45 provides a uniform thickness and compression set that is difficult to replicate with sealant, ensuring a more reliable long-term seal for Lennox HVAC equipment.
Is this gasket compatible with all Lennox furnaces?
This gasket is specifically designed for Lennox flue collector boxes. Always verify your specific model and serial number to ensure exact fitment for the combustion assembly you are servicing.
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 71L45 is a critical Flue Collector Box Gasket designed to maintain the structural integrity of the combustion path in high-efficiency furnace repair applications. This high-temperature sealing component is engineered to eliminate exhaust gas bypass by creating a gas-tight seal between the flue collector box and the heat exchanger interface. For technicians, ensuring a zero-leak seal is essential to prevent CO leakage and maintain proper static pressure within the combustion assembly. Constructed from durable, chemically resistant material, the Lennox 71L45 Gasket withstands the extreme thermal cycling and corrosive condensate typical of HVAC replacement parts in residential heating systems. Precision-cut for an exact OEM fit, this gasket facilitates a faster installation during flue box maintenance compared to generic RTV alternatives. When diagnosing fluctuating pressure switch readings or moisture around the collector box, replacing the Lennox 71L45 is the standard protocol to restore system efficiency and ensure safe operation for your clients. This part is a direct OEM furnace gasket replacement, ensuring full compatibility with specified Lennox series heating units.
Key Benefits- Gas-Tight Seal: Prevents combustion byproduct leakage into the cabinet, ensuring technician and occupant safety.
- High-Temperature Resistance: Engineered to maintain flexibility and sealing force under consistent thermal stress.
- OEM Precision: Eliminates the need for manual trimming, reducing labor time during furnace gasket replacement.
- Corrosion Resistance: Formulated to resist the acidic nature of furnace condensate found in high-efficiency flue systems.
What are the signs of a failing flue collector box gasket?
Technicians typically look for visible white or rusty streaks (condensate residue) around the flue collector box, erratic pressure switch trips, or flue gas odors during the startup sequence.
Can I use high-temp RTV instead of the Lennox 71L45?
While RTV can be used in emergencies, the 71L45 provides a uniform thickness and compression set that is difficult to replicate with sealant, ensuring a more reliable long-term seal for Lennox HVAC equipment.
Is this gasket compatible with all Lennox furnaces?
This gasket is specifically designed for Lennox flue collector boxes. Always verify your specific model and serial number to ensure exact fitment for the combustion assembly you are servicing.
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.












