Amana · Refrigerator Serious

dE — Defrost System Fault

The control did not see the evaporator temperature rise enough during a defrost cycle, indicating the defrost heater, defrost thermistor, or bimetal didn't operate correctly.

Keep using it?
Limited use only
DIY difficulty
Moderate
Verified against
amana.com ↗

How to fix it

  1. Unplug and remove the freezer rear panel.
  2. Inspect evaporator — if iced over, force defrost manually (heat gun on low, or unplug 24h).
  3. Measure defrost heater resistance (~20-50 Ω typical); replace if open.
  4. Measure defrost thermistor resistance against the chart for your model.
  5. Check the bimetal/thermal fuse for continuity at cold temps.
  6. Replace failed component and confirm a full defrost cycle completes.

Why it happens

Typical signs: dE code · Heavy frost on evaporator coil · Poor cooling in fresh food · Compressor runs constantly

  • Failed defrost heater Open element — no heat to melt frost.
  • Failed defrost thermistor Sensor cannot report coil temperature rise.
  • Open bimetal/thermal fuse Safety device opened and won't reset.
  • Failed main control board Triac driving heater not switching on.

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 Amana refrigerator codes

5Y EF 5Y EF — Evaporator Fan Fault CE CE — Communication Error CF CF — Condenser Fan Fault F1E1 F1E1 — Main Control Board Fault F2E1 F2E1 — Stuck Key on User Interface F8E1 F8E1 — Temperature-Sensor / Ice-System Fault

All Amana codes → All refrigerator 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: amana.com.