
Lochinvar & A.O. Smith 100093859 Assembly
The Lochinvar & A.O. Smith 100093859 Manifold Door Assembly is a high-precision OEM replacement engineered for high-efficiency gas-fired boilers and residential FVIR water heaters. As a veteran-grade burner door assembly, this kit is essential for maintaining the sealed combustion chamber's integrity, ensuring optimal thermal efficiency and safe manifold pressure regulation. The assembly integrates a robust door port designed to withstand high-temperature environments, facilitating seamless HVAC system diagnostics and internal component protection in Lochinvar Knight, Knight Pro, and Firebird series boilers.
For contractors performing a water heater manifold replacement, this genuine Lochinvar replacement part ensures precise manifold door assembly compatibility with original manufacturer specifications, preventing common ignition failures and irregular flame patterns. Weighing approximately 4.12 lbs, this industrial-grade HVAC manifold kit provides a reliable seal that is critical for the proper operation of the heat exchanger and burner assembly in both residential and commercial heating applications.
Key Benefits- Engineered Compatibility: Direct OEM replacement for Lochinvar and A.O. Smith high-efficiency systems, ensuring perfect fitment during furnace repair or maintenance.
- Enhanced Combustion Safety: Restores the airtight seal of the combustion chamber, preventing carbon monoxide leaks and ensuring proper air-to-fuel ratios.
- Optimized Heat Transfer: Maintains the heat exchanger’s operating efficiency by regulating airflow and burner positioning.
- Durable Construction: Built with heavy-duty materials to resist thermal stress and corrosion over extended service life.
What symptoms indicate a failing manifold door assembly?
Technicians typically look for burnt gaskets, warped door metal, or "Ignition Failure" lockouts caused by a breach in the combustion chamber seal.
Is this manifold door compatible with both Natural Gas and Propane units?
While the door itself is a mechanical housing, it is frequently used in systems utilizing the A.O. Smith 100093859 part number across various fuel configurations; always verify your specific model's burner orifice requirements.
Can I reuse the old gasket when installing this assembly?
It is standard trade practice to use a new high-temperature silicone gasket during installation to ensure a gas-tight seal and prevent future service calls.
This item is not eligible for free shipping.
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: $329.26
-65%$329.26
$115.24Lochinvar & A.O. Smith 100093859 Assembly
The Lochinvar & A.O. Smith 100093859 Manifold Door Assembly is a high-precision OEM replacement engineered for high-efficiency gas-fired boilers and residential FVIR water heaters. As a veteran-grade burner door assembly, this kit is essential for maintaining the sealed combustion chamber's integrity, ensuring optimal thermal efficiency and safe manifold pressure regulation. The assembly integrates a robust door port designed to withstand high-temperature environments, facilitating seamless HVAC system diagnostics and internal component protection in Lochinvar Knight, Knight Pro, and Firebird series boilers.
For contractors performing a water heater manifold replacement, this genuine Lochinvar replacement part ensures precise manifold door assembly compatibility with original manufacturer specifications, preventing common ignition failures and irregular flame patterns. Weighing approximately 4.12 lbs, this industrial-grade HVAC manifold kit provides a reliable seal that is critical for the proper operation of the heat exchanger and burner assembly in both residential and commercial heating applications.
Key Benefits- Engineered Compatibility: Direct OEM replacement for Lochinvar and A.O. Smith high-efficiency systems, ensuring perfect fitment during furnace repair or maintenance.
- Enhanced Combustion Safety: Restores the airtight seal of the combustion chamber, preventing carbon monoxide leaks and ensuring proper air-to-fuel ratios.
- Optimized Heat Transfer: Maintains the heat exchanger’s operating efficiency by regulating airflow and burner positioning.
- Durable Construction: Built with heavy-duty materials to resist thermal stress and corrosion over extended service life.
What symptoms indicate a failing manifold door assembly?
Technicians typically look for burnt gaskets, warped door metal, or "Ignition Failure" lockouts caused by a breach in the combustion chamber seal.
Is this manifold door compatible with both Natural Gas and Propane units?
While the door itself is a mechanical housing, it is frequently used in systems utilizing the A.O. Smith 100093859 part number across various fuel configurations; always verify your specific model's burner orifice requirements.
Can I reuse the old gasket when installing this assembly?
It is standard trade practice to use a new high-temperature silicone gasket during installation to ensure a gas-tight seal and prevent future service calls.
This item is not eligible for free shipping.
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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Product Information
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Description
The Lochinvar & A.O. Smith 100093859 Manifold Door Assembly is a high-precision OEM replacement engineered for high-efficiency gas-fired boilers and residential FVIR water heaters. As a veteran-grade burner door assembly, this kit is essential for maintaining the sealed combustion chamber's integrity, ensuring optimal thermal efficiency and safe manifold pressure regulation. The assembly integrates a robust door port designed to withstand high-temperature environments, facilitating seamless HVAC system diagnostics and internal component protection in Lochinvar Knight, Knight Pro, and Firebird series boilers.
For contractors performing a water heater manifold replacement, this genuine Lochinvar replacement part ensures precise manifold door assembly compatibility with original manufacturer specifications, preventing common ignition failures and irregular flame patterns. Weighing approximately 4.12 lbs, this industrial-grade HVAC manifold kit provides a reliable seal that is critical for the proper operation of the heat exchanger and burner assembly in both residential and commercial heating applications.
Key Benefits- Engineered Compatibility: Direct OEM replacement for Lochinvar and A.O. Smith high-efficiency systems, ensuring perfect fitment during furnace repair or maintenance.
- Enhanced Combustion Safety: Restores the airtight seal of the combustion chamber, preventing carbon monoxide leaks and ensuring proper air-to-fuel ratios.
- Optimized Heat Transfer: Maintains the heat exchanger’s operating efficiency by regulating airflow and burner positioning.
- Durable Construction: Built with heavy-duty materials to resist thermal stress and corrosion over extended service life.
What symptoms indicate a failing manifold door assembly?
Technicians typically look for burnt gaskets, warped door metal, or "Ignition Failure" lockouts caused by a breach in the combustion chamber seal.
Is this manifold door compatible with both Natural Gas and Propane units?
While the door itself is a mechanical housing, it is frequently used in systems utilizing the A.O. Smith 100093859 part number across various fuel configurations; always verify your specific model's burner orifice requirements.
Can I reuse the old gasket when installing this assembly?
It is standard trade practice to use a new high-temperature silicone gasket during installation to ensure a gas-tight seal and prevent future service calls.
This item is not eligible for free shipping.
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.












