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Nordyne control board single stage air handler 904531
Nordyne control board single stage air handler 904531
Nordyne control board single stage air handler 904531
Nordyne control board single stage air handler 904531

904531 Nordyne Single Stage Air Handler Control Board

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904531 Nordyne Single Stage Air Handler Control Board

Nordyne air handle 1-stage control circuit board. Board measures 3.5 x 5 inches. Replaces 1139-600, 624663-0 and 624663. FRU, PCB, B5.

Product Overview

904531 is a genuine OEM Nordyne single-stage air handler control circuit board. It measures 3.5 × 5 inches and replaces legacy boards 1139-600 and 624663, providing reliable on/off sequencing for fan and blower functions in compatible indoor air handlers.


Technical Specifications

Specification Detail
Board dimensions 3.5 in × 5 in
PCB type Rigid
Control type Single-stage air handler
Component package type Through-hole and surface mount mixed
Net weight 1.7505 lb
Shipping dimensions (L × W × H) 10 in × 12 in × 12 in
Packaging weight 10 oz


Cross-Reference Part Numbers

OEM Part Number Replaces
904531 1139-600, 624663


Compatibility

Fits Nordyne B5 and GB5 series indoor air handlers equipped with a single-stage control board. Before ordering, verify mounting hole pattern, connector pin-out, and harness compatibility against the existing control board.


Packaging & Shipping

  • Packaged in a standard 10 × 12 × 12 in box.

  • Includes protective foam inserts and ESD-safe bag.

  • Total shipping weight: approximately 1.44 lb (1.7505 lb net + 10 oz packaging).


Installation & Technician Notes

  • De-energize power and follow lockout/tagout procedures before servicing.

  • Remove the air handler’s access panel to expose the existing control board.

  • Photograph or label each wire harness and terminal to ensure correct reconnection.

  • Unscrew mounting standoffs and carefully lift out the old board.

  • Position the new 904531 board on the standoffs, secure with screws, and reconnect all harnesses.

  • Restore power and run the air handler through a start/stop cycle to confirm blower, fan, and safety interlocks operate correctly.

  • Inspect for any error codes or LED fault indicators; consult the OEM service manual if needed.