Lochinvar & A.O. Smith 100293702 Control Board 320788-702 Ensure the 90° flame is

Ensure the 90° flame is properly engulfing the top 1/3 of the thermopile element for maximum millivolt production

this unit is built with high-dielectric strength to withstand the rigorous thermal demands of commercial refrigeration and air conditioning environments

this replacement signal lamp helps prevent moisture carryover and downstream equipment damage by alerting operators to power status or maintenance requirements

The resistor is used to convert a 4-20mA control signal into a voltage signal that the actuator can process for proportional control

High Flow Design: The 1000 scim capacity prevents signal lag in long-run pneumatic lines

Lochinvar & A.O. Smith 100293702 Control Board 320788-702 Ensure the 90° flame isThe Lochinvar & A. O. Smith 100293702 Control Board is the primary integrated boiler control designed for precise HVAC system management in high efficiency commercial and residential units. As a direct OEM replacement part, this board is engineered to oversee the full sequence of operation, including ignition control, flame sensing, and temperature regulation. It is a critical component for technicians servicing Lochinvar Power Fin and A. O. Smith PBL