903106 Nordyne Integrated Control Board
903106 Nordyne Integrated Control Board
Product Overview
903106 is an OEM integrated control board for Nordyne furnaces, originally specified for M2 and M3 series and commonly used in G3, G4, G5, and G6 units. It provides ignition sequencing, blower control, safety lockouts, and diagnostic LED fault codes to simplify troubleshooting and ensure reliable operation.
Cross-Reference Part Numbers
| OEM Part Number | Replaces |
|---|---|
| 903106 | 624631-B |
| 6245570 | |
| 1012-955A | |
| 1334 | |
| 132322 | |
| HSCI 1012-83-9559B | |
| Partners Choice 903106+130924306+1 |
Cross-reference data sourced from Technical Hot & Cold Parts.
Compatibility
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Nordyne furnace control applications: M2, M3, G3, G4, G5, G6, and UTEC series
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Also fits OEM-labeled units from Maytag, Miller, Broan, Frigidaire, Gibson, Intertherm, and Partners Choice
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Kit includes mounting plate, wire leads, spade connectors, and installation instructions for models G5R, G(3,4)R, 80+, 90+ series
Technician Notes
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Wear an ESD wrist strap and handle the board by its edges to prevent static discharge.
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Replace the factory fuse with a 3 A fast-blow cartridge fuse before power-up.
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Verify all dip-switch and jumper settings per OEM service manual for exact model.
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Inspect and clean connector pins and harness terminals; replace corroded or pitted connectors.
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Photograph the original wiring layout prior to removal to ensure accurate reconnection.
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After installation, confirm 24 VAC control voltage between R and C, then cycle heat and cool modes.
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Use the on-board LED blink codes to diagnose relay and sensor faults—refer to the installation guide for code definitions.
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Listen for correct inducer startup, gas valve sequencing, and blower activation; note any abnormal delays.
Additional Resources
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Download the OEM wiring diagram and installation manual (PDF)
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Access a printable control board cross-reference sheet covering Nordyne and private-label units
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Watch our step-by-step video guide on integrated control board replacement
Nordyne circuit board for M2 and M3 series of furnaces. Also used in G3, G4, G5 & G6 units. For a spare or replacement fuse, order 3A fuse
Replaces 624538, 6245380, 624557, 6245570, 624564, 6245640, 624-5640, 624591, 6245910, 624628, 6246280, 624631, 624631A, 624631-A, 624631B, 624631-B, 6246310, 902378, 902696 & 902896.
CONTROL LIGHT STATUS
RED
Steady ON Control OK
Steady OFF No power
Rapid Flash - False flame or gas valve relay shorted
1 Flash - Limit circuit open or external load on "W" (does not apply to deck switch, see below) .
2 Flashes - Pressure switch is stuck open with inducer blower running.
3 Flashes - Pressure switch is closed with inducer off
4 Flashes - Ignition failure (check ground)
5 Flashes 115 vac & neutral reversed or no ground
YELLOW
Steady ON - Good flame signal
Blinking - Weak flame signal
Steady OFF - No flame signal