GE Profile AC controls

GE RARWT thermostat, ceiling control box, freeze sensor

GE's rooftop units are run from the ceiling control box. Coach 12 V feeds the box; the box feeds the wall stat three wires (12 V, one comms wire, ground) and switches the 115 V to the rooftop through the 6-pin plug. Every code on the stat's screen comes from the board. The freeze sensor sits in the evaporator coil and its plug hides up inside the return, above the filter: F1 lives there, not in the stat.