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Source-backed error-code guide

Reviewed

Frigidaire Room air conditioner LC Error Code

LC points to a communication path that is not homeowner-serviceable. Record the code, verify only safe exterior power conditions, use one reset, and request service if LC returns.

Applies to Frigidaire room air conditioner showing LC communication error

What the appliance detected

Detected condition

The system is not confirming expected communication between its indoor and outdoor sections or units.

What may contribute

Possible causes

  • A temporary communication state may clear after a power reset.
  • The supported product may have an internal or inter-unit communication connection that requires service diagnosis.
  • A control, harness, connector, or power-related condition may be involved, but LC alone cannot identify the failed component.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Confirm the exact model and installation type

    • Photograph the model number and LC display so service can identify the correct product architecture.
    • Check only that accessible power cords and plugs are normally connected and free of visible damage. Do not open electrical covers.

  2. Reset once, then stop if LC returns

    • Unplug or otherwise disconnect the room air conditioner from its normal power source for up to 30 seconds as Frigidaire directs, then restore power.
    • If LC returns, request qualified service rather than opening indoor or outdoor sections.

Actions not recommended

  • Do not assume LC uses the same wiring or service procedure as a mini-split or another Frigidaire model.
  • Do not open electrical compartments, reseat interconnect wiring, or test live communication voltage.
  • Do not bypass controls or safety devices to force operation.

When to stop and request service

  • LC returns after one documented reset.
  • Any inter-unit cable, plug, cord, or housing is visibly damaged.
  • The next step requires internal communication, control, harness, or power-supply diagnosis.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: September 23, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Frigidaire.

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