Lg Air Conditioner Error 26

⚡ Quick Answer: The LG air conditioner error code 26 indicates a communication failure between the indoor and outdoor units, primarily linked to the compressor circui... ✅ DIY Fixable

What Does Error 26 Mean?

The LG air conditioner error code 26 indicates a communication failure between the indoor and outdoor units, primarily linked to the compressor circuit. This fault can result from poor electrical connections, insulation issues within the inverter power module, or compressor malfunctions. The unit may stop operating, display the CH26 error, and the compressor might fail to start.

Common Symptoms:

  • AC stops operation and displays CH26
  • Compressor fails to start
  • Unit may shut down unexpectedly

Possible Causes

  • Poor electrical connection to compressor (U, V, W terminals) (high)
  • Insulation issue or fault within the inverter power module (IPM) (high)
  • Compressor malfunction (electrical or mechanical) (medium)
  • Indoor–outdoor unit communication fault (low)

How to Fix Error 26

DIY Fix Basic Checks Before Technician Visit

  1. Turn off the air conditioner power and disconnect from mains.
  2. Visually inspect accessible wiring between indoor and outdoor units for obvious damage or loose connectors.
  3. Ensure the outdoor unit’s compressor area is free of debris and blockages.

Technician Only Technician-Level Diagnostic and Repair

  1. Check electrical connections on compressor terminals U, V, W for proper contact and correct wiring.
  2. Measure insulation resistance of the inverter power module (IPM) and associated drive circuitry.
  3. Test compressor windings for proper resistance and insulation; replace compressor if winding faults are found.
  4. Verify PCB and IPM power components for damage and replace as needed.

Parts needed: Compressor, Inverter Power Module (IPM), Control PCB, Wiring harness/connectors

🛑 When to Call a Pro:
  • If error persists after basic checks
  • If you observe burning smell, smoke, or unusual noises
  • If any electrical components are visibly damaged

Technical Specifications

wattage 1000W
component Control Board
resistance 5-10 ohms
part_number LG 4681A20001B
voltage_rating 115V AC

Common Questions

What does 26 error mean on lg air conditioner?

Error 26 indicates a communication failure related to the compressor circuit, causing the unit to stop operating.

Can I fix lg air conditioner 26 error myself?

Yes, you can perform basic checks, such as inspecting wiring and ensuring the outdoor unit is clear of debris.

How much does it cost to fix 26 error?

Repair costs for error 26 can range from ¥20,000 to ¥120,000+, depending on parts and labor.

When should I call a technician for 26?

Call a technician if the error persists after checks, or if you notice burning smells, smoke, or damaged components.

Sources & References

Data last verified: 2026-07-07

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