M1 CONTROL BOARD Gas furnace part
Part number 903429
Nordyne integrated UTECH circuit board for M1M furnaces.
Replaces 624602, 6246020, 624602-0, 624602A, 624602B & 624640.
CONTROL LIGHT STATUS
Steady ON Control OK
Steady OFF No power
Rapid Flash False flame or internal control fault
- Flash Limit switch is open
- Flashes Pressure switch is open with inducer on
- Flashes Pressure switch is closed with inducer off
- Flashes Lockout due to failed ignition
- Flashes 115 vac & neutral reversed or no ground
- Steady ON Good Flame Signal
- Blinking Weak Flame Signal
- Steady OFF No Flame Signal
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