WHITE RODGERS (EMERSON ELEC)
WHITE RODGERS 47D01U-843 defrost control board
Replacement defrost control board for HVAC systems, compatible with Grainger item 451G39
- Direct replacement for Grainger 451G39
- White-Rodgers reliability for heat-pump defrost cycles
- New condition ensures full operational life
- Model 47D01U-843 fits specified HVAC systems
White Rodgers 47D01U-843 Defrost Board
This White Rodgers 47D01U-843 defrost control board is a replacement component for HVAC systems. It is designed for use with Grainger item 451G39 and suits technicians servicing compatible heat-pump equipment. The part is supplied new and ready for installation. It is not intended for buyers who need a different board model or a universal control.
Thermals noise and power draw
The board operates within the electrical parameters of the host HVAC unit and draws minimal control-circuit power. It has no moving parts so it produces no audible noise during defrost cycles. Heat output is negligible and managed by the equipment enclosure. Installers who require detailed power-consumption data should consult the equipment manufacturer.
Highlights
- Direct replacement for Grainger 451G39
- White-Rodgers reliability for heat-pump defrost cycles
- New condition ensures full operational life
- Model 47D01U-843 fits specified HVAC systems
Specifications
| Brand | WHITE-RODGERS |
|---|
Questions about this item
How is the 47D01U-843 board installed in the furnace?
Shut off power, remove the old board, transfer each wire to the matching terminal on the 47D01U-843, secure the board with its mounting screws, then restore power and verify the defrost cycle initiates.
What maintenance will the 47D01U-843 need after installation?
Inspect the board annually for corroded terminals or burnt traces; clean dust from the housing and tighten any loose wire connections to keep the defrost timing accurate.
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