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LG · Refrigerator (Side-by-Side)

LG Refrigerator (Side-by-Side) F dH error code

Difficulty: Medium · Cost: $0–$200 · Duration: 8h

The F dH error means your LG refrigerator's freezer compartment defrost cycle timed out before reaching the target temperature. This is the freezer-specific variant of the dH error. F dH points to a problem in the freezer defrost system while r DH on the same models indicates the same issue in the refrigerator compartment. Frost buildup around the defrost components is a common cause and defrosting the unit manually can resolve it. If the error returns after defrosting the defrost heater or sensor will need professional inspection.

Common causes

  • Excessive frost buildup around the freezer evaporator blocking heat distribution during defrost
  • Freezer defrost heater has malfunctioned or failed
  • Freezer defrost thermostat is faulty and not allowing the heater to activate
  • Freezer defrost sensor is providing incorrect temperature readings

How to fix it

  1. 1

    Unplug the refrigerator and open the freezer door wide

  2. 2

    Leave the door open for at least 8 hours in summer or up to 3 days in winter to allow all frost to melt fully

  3. 3

    Place towels around the unit to absorb water as the frost melts

  4. 4

    Once fully defrosted plug the unit back in and allow 24 to 48 hours to return to normal temperature

  5. 5

    If F dH returns after defrosting contact a technician to inspect the defrost heater and sensor

Related LG Refrigerator (Side-by-Side) error codes

1

OF F

Demo mode is active — all cooling has been disabled

easy
2

FS

The freezer temperature sensor has a short circuit or disconnection

hard
3

rS

The refrigerator temperature sensor has a short circuit or disconnection

hard
4

dS

The defrost sensor has a short circuit or disconnection

hard

F dH error — frequently asked questions

What does the F dH error mean on a LG refrigerator (side-by-side)?

The freezer defrost cycle failed to complete within the expected time

What causes the F dH error?

The F dH error is usually caused by: Excessive frost buildup around the freezer evaporator blocking heat distribution during defrost; Freezer defrost heater has malfunctioned or failed; Freezer defrost thermostat is faulty and not allowing the heater to activate; Freezer defrost sensor is providing incorrect temperature readings.

Can I fix the F dH error myself?

It's possible for a moderately handy person, but budget 8h and expect some disassembly.

How much does it cost to fix the F dH error?

Fixing the F dH error on a LG refrigerator (side-by-side) typically costs $0–$200, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my refrigerator (side-by-side) with the F dH error?

In most cases yes, but it's best to address the F dH error soon — see the fix steps below to resolve it.