If the switch remains open while the inducer is at full speed

the CNT1662 is a direct OEM replacement for technicians addressing short-cycling or thermal cutout issues in high-efficiency Trane and American Standard systems

or operates under low voltage or long line set conditions

Its robust construction is optimized for modulating control

While built for durability

Lochinvar & A.O. Smith 100208465 Control Board Refrigerant If the switch remains openThe Lochinvar & A. O. Smith 100208465 Control Board is a critical OEM replacement part designed for high efficiency commercial water heaters and hydronic boilers. Engineered as a direct substitute for the RLY20001 and RLY20001K legacy boards, this integrated ignition control circuit manages vital system sequences, including flame rectification, temperature regulation, and draft inducer timing. It serves as the primary logic hub for monitoring pressure