Washer-dryer combo shows F25 and may not spin properly or may stop with clothes wet.

Safety first: Disconnect power. Avoid placing hands near the belt or pulley when power is connected.

Step-by-step checks:

• Inspect motor harness: Access the motor from the rear. Check the tachometer wires and connector for damage or looseness.
• Test tach coil: Measure resistance across tach terminals. Compare to Whirlpool specifications. An open or shorted coil indicates a bad motor.
• Check for mechanical binding: Ensure the drum turns freely by hand; a seized bearing can cause speed errors.

When to replace: Replace the drive motor if the tach coil is defective. If the motor tests good but F25 persists, the main control board may not be reading the tach signal correctly.