A.o. Smith 100109954 Pressure Switch Kit Bti Btn

Product Description

The A.O. SMITH 100109954 is a pressure switch kit designed for use in BTI and BTN series water heaters. The pressure switch monitors combustion air and flue gas conditions, acting as a safety interlock that prevents burner operation when proper venting or draft conditions are not confirmed. Licensed plumbers and HVAC technicians install this component as part of routine maintenance or fault diagnosis when a water heater fails to ignite or displays a pressure switch fault code. It is an OEM-specified replacement part sourced directly for A.O. SMITH BTI and BTN series units.

This pressure switch kit applies to residential and light commercial water heater installations where BTI or BTN series A.O. SMITH units are in service. It is typically replaced during service calls involving ignition lockout, venting issues, or pressure switch failure codes. The kit format ensures the technician has the necessary hardware for a complete swap without sourcing individual components separately.

Key Features

• OEM-specified pressure switch kit for A.O. SMITH BTI and BTN series water heaters
• Functions as a combustion safety interlock to confirm proper draft and venting before burner ignition
• Kit format includes components needed for a complete field replacement
• Designed to restore factory safety performance when the original switch fails or drifts out of spec

Compatibility

Designed as an OEM-style replacement pressure switch kit for A.O. SMITH BTI and BTN series water heaters, as indicated by the product designation.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Shut off gas supply and power to the water heater before beginning any service work. Inspect the venting system and pressure switch tubing for blockage or cracks before installing the replacement switch. Follow all applicable local codes and the manufacturer service documentation when completing the repair.

Technical Specifications

• Application: BTI and BTN Series Water Heaters
• Component Type: Pressure Switch Kit

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: 100109954