M1 Series Control Board Nordyne PN 903429

Description

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
RED
Steady ON Control OK
Steady OFF No power
Rapid Flash False flame or internal control fault

1. Flash Limit switch is open
2. Flashes Pressure switch is open with inducer on
3. Flashes Pressure switch is closed with inducer off
4. Flashes Lockout due to failed ignition
5. Flashes 115 vac & neutral reversed or no ground

YELLOW

1. Steady ON Good Flame Signal
2. Blinking Weak Flame Signal
3. Steady OFF No Flame Signal