A.o. Smith 100093801 Manifold Door Assembly Natural Gas

Product Description

The A.O. SMITH 100093801 is a natural gas manifold door assembly designed for use in residential and light-commercial water heater applications. This assembly serves as the sealed front enclosure for the burner manifold compartment, housing the gas valve, burner tube, and ignition components in a single serviceable unit. It is a direct OEM-style replacement part installed by licensed plumbers and HVAC technicians during routine burner service, component failure repair, or combustion chamber maintenance. The natural gas configuration makes it specific to NG-fired water heater systems and is not interchangeable with propane variants.

This manifold door assembly is intended for natural gas water heaters where the existing manifold door has failed, is damaged, or requires replacement as part of a burner assembly service. It is typically found in residential tank-style water heater installations where access to the burner compartment is required for gas valve, thermocouple, or igniter replacement. Technicians replacing this assembly should confirm the fuel type designation matches the installed appliance before ordering.

Key Features

• Natural gas fuel type configuration — not for use with propane systems
• OEM-style replacement for A.O. SMITH water heater manifold door applications
• Provides sealed access to the burner compartment, gas valve, and ignition components
• Designed for straightforward field replacement by qualified service technicians

Compatibility

Designed as an OEM-style replacement manifold door assembly for A.O. SMITH natural gas water heaters. Confirm the specific model number of the installed unit against A.O. SMITH service documentation before installation, as manifold door assemblies are model-specific.

Installation Notes

Installation should be performed by a licensed plumber or qualified gas appliance technician in accordance with local codes and the appliance manufacturer service documentation. Shut off the gas supply and allow the appliance to cool completely before disassembling the burner compartment. Verify all gas connections are leak-free using an approved leak detection solution after reassembly. Do not restore gas supply or re-light the appliance until all connections have been inspected and confirmed secure.

Technical Specifications

• Fuel Type: Natural Gas

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: 100093801