dE Serious Moderate DIY

Amana Refrigerator dE — Defrost System Fault

Amana Refrigerator · Error code dE

What dE Means

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.

Symptoms

  • dE code
  • Heavy frost on evaporator coil
  • Poor cooling in fresh food
  • Compressor runs constantly

Common Causes

1
Failed defrost heater

Open element — no heat to melt frost.

2
Failed defrost thermistor

Sensor cannot report coil temperature rise.

3
Open bimetal/thermal fuse

Safety device opened and won't reset.

4
Failed main control board

Triac driving heater not switching on.

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.

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.

Common replacement Defrost heater View on Amazon→ Common replacement Defrost thermistor View on Amazon→ Common replacement Bimetal / thermal fuse View on Amazon→

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 F1E2 F1E2 — Main Control to UI Communication Loss F2E1 F2E1 — Stuck Key on User Interface

All Amana codes → All refrigerator codes →

Verified against manufacturer documentation: amana.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.