Lochinvar & A.O. Smith 100208468 Control 320074-702 this specific model (70-42278-02) is

this specific model (70-42278-02) is strictly rated for 208-230V operation

contractors prioritize components that facilitate HVAC system diagnostics and maintain high energy efficiency

this part is the approved OEM limit switch for many models within those brands

This is often caused by a dirty condenser coil

Lochinvar & A.O. Smith 100208468 Control 320074-702 this specific model (70-42278-02) isThe Lochinvar & A. O. Smith 100208468 User Interface Control is a critical OEM replacement part engineered for precise management of commercial boiler and water heater systems. Designed to replace legacy part numbers RLY20031, RLY20031K, and 100167553, this control board serves as the primary communication hub between the technician and the appliance's internal logic. It is specifically calibrated for the Copper Fin II series, including models CF 402