A.o. Smith 100309396 Thermostat Pcb Assembly Kit

Product Description

The A.O. SMITH 100309396 is a replacement thermostat and printed circuit board (PCB) assembly kit designed for compatible A.O. SMITH water heater applications. This kit restores accurate temperature sensing and electronic control functions to units where the original thermostat or control board has failed. It is a direct replacement component specified for use in AO Smith water heater systems requiring this exact assembly. Installation is typically performed by licensed plumbers or water heater service technicians familiar with electronic control components and low-voltage wiring.

This thermostat PCB assembly kit is intended for residential and light commercial water heater applications where the original control assembly has degraded or malfunctioned. It is specified as a replacement for A.O. SMITH water heaters that call out part number 100309396. Service technicians should confirm the part number match against the existing unit before installation to ensure correct fitment.

Key Features

• Direct replacement thermostat and PCB assembly for applicable A.O. SMITH water heaters
• Restores electronic temperature control and sensing functions
• Kit format includes necessary assembly components for the repair
• Specified as a universal ET (electronic thermostat) style control assembly

Compatibility

Designed as a direct OEM-style replacement for compatible A.O. SMITH water heater models that specify part number 100309396. Verify the part number against the unit's data label or service documentation before ordering.

Installation Notes

Installation should be performed by a licensed plumber or qualified water heater technician. Always disconnect electrical power to the water heater and shut off the cold water supply before beginning any control component service. Handle the PCB assembly carefully to avoid electrostatic discharge damage to sensitive components. Consult the unit's wiring diagram and applicable local codes before making any electrical connections.