Ao Smith 100113143 Blocked Inlet Switch

Product Description

The AO SMITH 100113143 is a blocked inlet switch designed to detect restricted or obstructed air inlet conditions in water heating equipment. When airflow to the unit is compromised, this safety switch responds by interrupting operation to prevent unsafe combustion conditions and protect the heat exchanger and burner assembly. It is a direct-fit replacement component typically installed by licensed plumbers and HVAC technicians during routine service or fault diagnosis on residential water heaters.

This switch is used in residential water heater applications where inlet air monitoring is required as part of the combustion air safety circuit. It is suited for installations where code or manufacturer requirements call for blocked inlet detection to ensure safe burner operation. Technicians replacing a failed or suspect safety switch will find this a straightforward component swap during a standard service call.

Key Features

• Detects blocked or restricted inlet air conditions to halt unsafe burner operation
• Functions as a safety interlock within the combustion air circuit
• Direct-fit OEM-style replacement for AO SMITH water heater applications
• Compact design suited for installation in tight equipment compartments

Compatibility

Designed as an OEM-style replacement blocked inlet switch for AO SMITH residential water heater systems. Verify the part number against the unit's service label or parts diagram before installation.

Installation Notes

Installation should be performed by a licensed plumber or HVAC technician familiar with water heater combustion safety systems. Shut off the gas supply and disconnect power to the unit before servicing any safety switch components. Confirm all wiring connections are secure and the inlet air path is clear of obstruction before returning the unit to service. Follow all applicable local codes and the manufacturer's service documentation during replacement.

Technical Specifications

• Component Type: Blocked Inlet Switch

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100113143