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

the system running continuously without reaching the setpoint

Common Questions Can I use the 24" M+MG2 on a gas boiler without a draft hood

as it utilizes a 4-way pilot valve to drive the PTFE-lubricated main slide

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