Nordyne 1045845R Defrost Board 319852-301 Includes the vital bleed port

Includes the vital bleed port orifice and restriction elbows necessary for proper pilot-to-main-valve communication

making it a staple for contractors managing critical HVACR steam systems where durability and exact pressure reduction are non-negotiable

providing a 40-micron filtration level to maintain system cleanliness and prevent debris-related failures in the field

single-phase motor pulling roughly 2

Nordyne 1045845R Defrost Board 319852-301 Includes the vital bleed portThe Nordyne 1045845R Defrost Board is the primary OEM replacement for the aging 1035831R and 624813 control modules. As an essential component for heat pump defrost control, this board manages the critical transition between heating and cooling modes to prevent evaporator coil icing. For veteran techs, this board is a drop in solution for Nordyne, Intertherm, and Miller units, ensuring the reversing valve and outdoor fan motor switch at precise