This part is widely used in many Williams wall heaters

this HKSX series auxiliary heater provides reliable supplemental warmth or primary emergency heating for residential HVAC systems

It operates on 208-230Vac single phase power

By processing electrical signals from the thermostat and managing data flow to the blower motor

Bard 5651-213 TXV 326058-755 This part is widely usedThe Bard 5651 213 thermostatic expansion valve is a precision engineered TXV for HVAC systems designed to maintain optimal superheat across varying evaporator loads. Featuring 3 8 x 3 8 connections, this balance port expansion valve ensures stable refrigerant flow control, preventing liquid slugging and protecting the compressor during low load conditions. Built for durability in commercial and residential applications, the Bard replacement TXV is