This specific control board is designed for systems utilizing standard multi-speed PSC blower motors typical of the HK42FZ application range

High-capacity air discharge facilitates faster steam system heat-up times

and Payne furnace and fan coil units

Its compact profile and union connections simplify installation and field service

Lochinvar & A.O. Smith 100110039 Thermostat 320074-702 This specific control board isThe Lochinvar & A. O. Smith 100110039 Thermostat is a technician grade component designed for precise temperature regulation in commercial and residential electric water heaters. This lower thermostat assembly features a single pole, wire in configuration with a 2 screw terminal design, ensuring a secure electrical connection to the heating element. It operates within a standard 90F to 150F temperature range, allowing for accurate set point