A.o. Smith 100342430 Pcb Kit Gas Tankless EK864

Product Description

The A.O. SMITH 100342430 is a printed circuit board (PCB) kit designed for gas-fired tankless water heaters. This control board kit serves as the electronic brain of the unit, managing ignition sequencing, temperature regulation, and safety fault monitoring. It is a factory-authorized replacement assembly intended for installation by licensed plumbers or water heater service technicians working on A.O. SMITH tankless gas water heater systems equipped with the EK864 control platform.

This PCB kit applies to gas-fired tankless water heater installations in residential or light commercial settings where the EK864 board is the specified control assembly. Tankless units are typically installed in closets, utility rooms, or on exterior walls, and demand board-level service when the unit logs persistent error codes, fails to ignite, or loses temperature control response. The 100342430 kit provides the replacement electronics needed to restore proper operation without replacing the full heater.

Key Features

• Factory-replacement PCB kit engineered for gas tankless water heater control systems
• Supports ignition sequencing, temperature management, and safety fault monitoring functions
• EK864 control platform designation ensures proper fit within the specified heater line
• Kit format includes the board assembly as needed for a complete swap-out service
• Designed to restore full electronic control function to the water heater

Compatibility

Designed as an OEM-style replacement PCB kit for A.O. SMITH gas tankless water heaters utilizing the EK864 control board assembly.

Installation Notes

Installation should be performed by a licensed plumber or qualified water heater service technician. Before servicing, shut off the gas supply and disconnect electrical power to the unit at the breaker. Handle the PCB carefully to avoid static discharge damage to sensitive components. Refer to the unit service manual for board mounting, connector orientation, and startup verification procedures.

Technical Specifications

• Product Type: PCB Kit
• Fuel Type: Gas
• Appliance Type: Tankless Water Heater
• Control Platform: EK864

Standard Information

• Brand: A.O. SMITH
• Manufacturer Part Number: 100342430