Kenmore Refrigerator F dH error code

The defrost system failed — the control found a fault in the defrost heater circuit, which can mean a bad defrost heater, a blown thermal fuse, or a failing control board. When defrost does not run, frost builds up on the evaporator coils until airflow and cooling suffer.

Also shown as: r dH, F dH, Er dH

Last updated: September 30, 2026

Quick answer: Kenmore refrigerator error code F dH: defrost heater circuit failure. The most common cause is failed defrost heater element. Try this first — look for heavy frost buildup. If that does not clear it, manually defrost once. If the code persists, call a qualified technician.

What causes the F dH error?

  • Failed defrost heater element
  • Blown defrost thermal fuse
  • Failing main control board
  • Damaged wiring in the defrost circuit

How to fix Kenmore F dH — step by step

Work through these in order, from simplest and safest first. Stop as soon as the code clears.

  1. Look for heavy frost buildup
    Check the back wall of the freezer for thick frost or ice. Heavy buildup confirms the defrost system is not running.
  2. Manually defrost once
    Unplug the fridge and let it defrost with the doors open. This restores cooling temporarily but will not fix the underlying heater fault — treat it as a diagnostic step, not a repair.
    Safety warning: Store perishables in a cooler during the defrost.

When to call a technician

Stop and call a qualified technician if any of these apply:
  • Frost returns within days of a manual defrost
  • You need to test the heater, fuse, or board — this requires panel removal and a meter
  • The fridge stops cooling entirely

Frequently asked questions

What is the difference between F dH and r dH?

Both indicate a defrost heater circuit failure; the letter prefix just reflects which temperature display shows it. Troubleshoot them the same way.

Sources

Every meaning and fix above was checked against official manufacturer documentation:

FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.

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