What a Communication Error Means on Your Appliance
A communication error appears when two or more internal components—usually control boards, sensors, or wiring harnesses—stop sending signals to each other. This issue is common in refrigerators, dishwashers, ovens, washers, and dryers. When communication fails, the appliance may freeze, shut down, or refuse to start.
Most Common Causes of Communication Errors
1. Loose or Damaged Wiring Harness
Vibration, heat, and moisture can loosen wiring connectors over time. If a harness becomes partially disconnected, the appliance may lose communication between boards or sensors.
2. Failed Control Board
Modern appliances often have multiple control boards. If one board fails or stops sending signals, the appliance displays a communication error and may stop mid‑cycle.
3. Moisture or Corrosion
Moisture inside the appliance can corrode connectors and disrupt communication. Dishwashers, refrigerators, and washing machines are especially vulnerable.
4. Power Surges or Electrical Interference
Sudden voltage spikes can damage communication circuits. Even minor surges may cause temporary communication faults that require a reset.
5. Sensor Failure
If a temperature, moisture, or pressure sensor stops responding, the control board may interpret it as a communication failure.
How to Troubleshoot a Communication Error
- Unplug the appliance for 5–10 minutes to reset the control boards.
- Check for moisture, leaks, or condensation around the appliance.
- Ensure the appliance is not overloaded or overheating.
- Inspect visible wiring for loose connectors or damage (if accessible).
- Try a different outlet to rule out electrical interference.
If the communication error returns after a reset, the issue is likely internal and requires professional diagnosis.
When to Call a Professional
Persistent communication errors often point to a failing control board, damaged wiring harness, or sensor malfunction. These components require proper testing and should be handled by a qualified technician.
Internal Resources to Help You Troubleshoot
- Visit our FAQ for quick answers to common appliance issues.
- Browse the Blog for more troubleshooting guides across all appliance types.
- Use our Contact page if you need help identifying the cause.
Trusted External Resources
- U.S. Department of Energy for appliance safety and maintenance guidance.
- Consumer Reports for appliance reliability and performance insights.
Key Takeaway
A communication error means your appliance’s internal components aren’t talking to each other correctly. Resetting the appliance, checking wiring, and inspecting for moisture can help—but recurring errors usually require professional repair.