Lochinvar & A.O. Smith 100093769 Board 321702-401 always verify your unit's service

always verify your unit's service manual to ensure the immersion depth matches the tank's requirements

allowing for straightforward swaps during field service without modifications

It is designed to support standard fan speed control (Off/Hi/Med/Low) typical of Macon-controlled air handlers and fan coils

this OEM Bard replacement part is the standard for maintaining Direct Spark Ignition (DSI) integrity in high-demand heating applications

What is the shelf life of an opened 1-gallon container

Lochinvar & A.O. Smith 100093769 Board 321702-401 always verify your unit's serviceThe Lochinvar & A. O. Smith 100093769 Thermodisc Board Replacement Kit is a critical OEM component designed for AWHC control board restoration in high efficiency commercial and residential water heating systems. As a direct factory replacement for the legacy 6910605 thermodisc board, this kit integrates the latest logic to manage high limit safety cutouts and precise temperature monitoring. For technicians servicing Lochinvar Knight or A. O. Smith