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Error code reference

LG Refrigerator Error Code 26E

FF-DEF Heater Error

LG codesLG refrigerator codes
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What the 26E error code actually means

Your LG refrigerator is showing a problem with the defrost heater in the fresh food section, meaning the heater that melts frost buildup stopped working correctly or took too long to finish its job. This can cause frost to accumulate inside the fridge compartment and eventually affect cooling. A technician will need to check the heater, its fuse, and the wiring to find and fix the specific cause.

Diagnostic procedure

The full 26E procedure

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1
First diagnostic step
Disconnect Main PCB CN70 wire; measure resistance between CN70 White and CN70 Gray: should be 120 (440) ohm ±7%. 0 ohm = heater short, infinity = wire/bimetal open.
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Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of 26E

Ranked by how often they cause this code
  1. 1Blown Thermal Fuse (Bimetal Limiter)
  2. 2Defrost Heater Open Circuit or Disconnection
  3. 3Defrost Heater Short Circuit
  4. 4Heater Housing Separation or Contact Error
  5. 5Main PCB Fault

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Questions people ask about 26E

What does 26E mean on a LG refrigerator?
The 26E code indicates a fresh food defrost heater error. It activates when the defrost cycle in the fresh food compartment fails to complete within 80 minutes of continuous heater operation. Possible causes include a short circuit, open circuit, blown thermal fuse, heater housing separation, or wiring disconnection in the defrost heater circuit. A technician typically begins diagnosis by measuring resistance at the CN70 connector on the main PCB.
Is it safe to keep using my LG refrigerator with a 26E error?
Continuing to run the refrigerator with a 26E error is not advisable. A non-functional defrost heater allows frost to accumulate progressively in the fresh food compartment, which can block airflow, reduce cooling efficiency, and eventually damage other components. Food safety may also be compromised if temperatures rise due to blocked airflow.
Will resetting my LG refrigerator clear the 26E error code?
A reset may temporarily clear the 26E code from the display, but the error will return if the underlying fault in the defrost heater circuit has not been repaired. Repeatedly resetting without fixing the root cause allows frost buildup to worsen over time. The error should be diagnosed and the faulty component replaced before the reset is expected to hold.
Can I fix a 26E error on my LG refrigerator myself?
Experienced DIYers can perform the initial resistance check at the CN70 connector with a multimeter after unplugging the refrigerator. If the reading is infinite, the thermal fuse or wiring is the likely culprit, and replacing the thermal fuse is a moderately straightforward repair. However, if the heater assembly itself needs replacement or the main PCB is involved, professional service is recommended to avoid further damage.
How much does it cost to repair a 26E error on an LG refrigerator?
Repair costs depend on which component has failed. Replacing a thermal fuse is typically the least expensive fix, with parts generally ranging from a few dollars to around twenty dollars. A full defrost heater assembly can cost anywhere from thirty to over one hundred dollars in parts, plus labor. If the main PCB requires replacement, costs can range from one hundred fifty to three hundred dollars or more including installation.

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