KitchenAid · Dryer Serious

F31 — Motor Drive System Fault

The control detected an error driving the drum motor — often a motor, capacitor, or control fault.

Keep using it?
Limited use only
DIY difficulty
Hard
Verified against
kitchenaid.com ↗

How to fix it

  1. Unplug the dryer and remove the top/front to access the belt.
  2. Inspect the drive belt — replace if broken or off the pulley.
  3. Spin the motor by hand; if seized or noisy, replace.
  4. Test motor windings per service manual specs.
  5. Replace ACU if motor tests good and belt is intact.

Why it happens

Typical signs: F31 displayed · Drum will not turn · Humming but no spin · Dryer trips breaker

  • Failed drive motor Open winding or seized bearing
  • Failed motor start capacitor (on some models) Capacitor lost capacity
  • Belt off and idler engaged motor switch Broken belt removed load and confused control
  • ACU motor circuit fault Damaged relay or driver on the main board

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

More KitchenAid dryer codes

AF AF — Airflow Restriction E1 E1 — Thermistor Open Circuit E2 E2 — Thermistor Shorted F01 F01 — Main Control Board Failure F22 F22 — Exhaust Thermistor Fault F23 F23 — Exhaust Thermistor Shorted

All KitchenAid codes → All dryer codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: kitchenaid.com.