Question about Goodman GMS90703BXA Heater

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No light at all on board

I have no light at all on my board. I have power to the unit, but it will show no signs of turning on (like it has no power). I would have to guess the board is shot. It seems like a pretty easy job to replace. Is there anything I can be missing or should know.

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  • djm41368 Nov 22, 2008




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Have you checked your fuse? It happened to me and drove me nuts. The board would not even get the termostat to triger?

Posted on Nov 21, 2008

  • MasChingon Nov 21, 2008

    It should have a 3 or 5 amp fuse on the board.



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E2 error on pro form 730 key in belt and motor run about 5 sec and shuts down sensor light blinks but not a steady light

Dear Sir:

I will try to help you, use the patience and carefully: need screwdriver, hex, allen+Dvom(DigitalVoltemeter)

Troubleshooting: ERR2 - Motor Movement

Since the motor moves when you press speed up, focus on the optic sensor, its wire connections, and the

optic sensor wheel. If all seems well at the sensor, inspect the motor.

Optic Sensor

??? Optic sensor wheel - Make sure that the optic sensor wheel rotates securely, without wobbling, in the

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bent, replace the optic sensor wheel.

??? Optic sensor wires - Make sure that wires are inserted securely to the optic sensor and to the drive board.

Check wire continuity.

??? Optic sensor - Turn on unit power. Turn the motor flywheel with your hand. The optic sensor

indicator (LED10, drive board) should light. . If it does not light, and all parts above are

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??? Motor arcing - Does the motor show signs of wear - irregular arcing, carbon dust?

??? Motor brushes - Do brushes show signs of irregular wear - cracks, dents, lines? Replace the

motor brushes.

??? M+ M- Wires - Make sure wires are connected properly.


??? Display main IC - To ensure proper signal processing, press down on the main IC on the display

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??? Ribbon cable - Ensure that the ribbon cable is attached at the drive and display boards. Check cable

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Turn unit power off and then on to clear the ERR2 message from the display. To test whether the drive

board is putting out power to the motor, insert multimeter probes on the M+ M- connectors and press

the speed up key. . (Note: To avoid ERR2.)

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If the drive board puts out power to the motor, but the motor does not operate, either the motor wires or

motor is malfunctioning. Test wires for continuity. Inspect connections. Perform an ohm test on the

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If there is no power to the motor, either the signal is not arriving at the drive board, the transformer

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??? Wires and their connections - inspect data cable connections from the display to the drive board,

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??? Inductor (6310 only) - inspect inductor and its wires and their connections. .

??? Transformer - inspect the transformer and its wires and their connections.

??? Drive Board - inspect the drive board for burnt or cracked components. Inspect LEDs (See DRIVE.03

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replace the drive board.

wITH THIS YOU FIX IT. If you need further assistance, please reach me



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Won't Power On

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board or junk it

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