CH26
LG Discharge Pipe High Temperature Protection

System displays CH26 and shuts down, often shortly after startup.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed discharge pipe thermistor, Blocked or dirty outdoor coil, Low refrigerant charge causing compressor overheating, Faulty outdoor fan motor

How to Fix / Troubleshooting

Safety: Turn off power before opening the outdoor unit. The discharge line can be extremely hot during operation.

Steps:

  • Clean outdoor coil: Remove debris and wash the coil as described for CH24.
  • Check outdoor fan: Confirm the fan runs whenever the compressor is on. If not, do not operate the unit until the fan motor is repaired or replaced.
  • Inspect discharge thermistor: Locate the sensor clipped to the hot discharge line near the compressor. Ensure it is firmly attached and not damaged. Reseat its connector on the PCB.
  • Power reset: After cleaning and checks, power the system off for 10 minutes, then on, and test.

Technician tasks: If CH26 persists, a technician should test the discharge thermistor, check refrigerant charge, and verify compressor operation. Overheating due to low charge or internal compressor issues requires professional service.

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Repair Difficulty

Hard 4/5

Required Part

Discharge Pipe Thermistor
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