Lochinvar & A.O. Smith 100167807 Board 318973-401 but replacing both is the

but replacing both is the standard best practice for long-term reliability

or electric heat sources

Easy Integration: Standard 1/8" FNPT air connection and surface mounting design simplify contractor installation

For proper operation and to satisfy plumbing codes

In high-demand throttling or on-off service

Lochinvar & A.O. Smith 100167807 Board 318973-401 but replacing both is theThe 100167807 Integrated Control Board functions as the primary logic controller for specific A. O. Smith and Lochinvar high efficiency water heating systems. Engineered to manage critical functions including ignition sequencing, temperature regulation, and safety safety monitoring, this OEM replacement board ensures precise modulation and peak thermal efficiency. It replaces legacy part numbers 100167808 and 9008272005. Designed for the rigorous