47-102684-83 Rheem defrost control kit with air sensor
Rheem Protech demand defrost control kit with external sensors. Board measures 3.5" x 3.75". Some earlier version of Demand Defrost Control Boards did not use a separate air sensor. Instructions are included for mounting the air sensor which is now required whether your old board had it or not.
Also known as part # 4710268483, 1157-100 & 1157-83-1002A