Washer-dryer combo drum does not spin or tumble; motor hums or is silent; E07 is displayed.

Safety first: Unplug the unit before accessing the motor or underside. Avoid rotating the drum by hand with power applied.

Step-by-step checks:

• 1. Check for mechanical obstruction: Open the door and try to rotate the drum by hand. It should turn smoothly. Grinding or binding may indicate a foreign object between the tubs or a seized bearing, which must be addressed before motor testing.
• 2. Inspect the drive belt: Remove the rear panel to view the drive belt between the motor pulley and drum pulley. Ensure the belt is intact, properly tensioned, and not off the pulley. Replace if frayed or broken.
• 3. Inspect motor wiring: Locate the drive motor at the bottom rear of the tub. Check the wiring harness connector for secure fit and signs of overheating or corrosion. Reseat the connector.
• 4. Test motor windings: Disconnect the motor connector and measure resistance across the motor windings according to the service manual. Open or shorted windings indicate a failed motor.
• 5. Check tachometer sensor (if separate): Some Monogram motors have an integrated tachometer. Test its resistance and inspect the sensor wiring. A failed tachometer can cause E07 even if the motor runs briefly.
• 6. Inspect control board: Remove the top panel and inspect the main control board for burned traces or components in the motor drive section. Ensure the motor connector at the board is fully seated.
• 7. Replace faulty components: Install a new OEM Monogram drive motor if windings or tachometer are defective. If the motor tests good but E07 persists, the main control board may need replacement.

When to call a technician: Motor and control board replacement involve high current circuits and should be performed by a qualified technician if you are not experienced with electrical repairs.