haier | refrigerator – Control Board Communication Fault / fridge light is on but not cooling
Error Codes (undefined): Troubleshooting, Fixes & Prevention Tips explained below.
What Does the Co (Control Board Communication) Error Mean❓
The Co error in the refrigerators indicates a communication fault between the main control board and other internal boards such as the display, dispenser, or inverter board. This can lead to unresponsive controls, cooling issues, or complete system malfunction.
refrigerator - Common Causes of Co Control Board Communication Fault
- Loose or broken wiring between boards
- Power surge damaging circuit boards
- Defective control board or display board
- Moisture causing connector corrosion
- Internal short in the inverter or main PCB
refrigerator - How to Fix Co Control Board Communication Fault Step-by-Step❓
Unplug and Reset the Refrigerator
- Unplug the refrigerator or turn off the circuit breaker.
- Wait 5 to 10 minutes, then restore power.
Inspect Top Hinge Wiring
- Open the top hinge cover and inspect for loose or broken wires.
Check Internal Harnesses
- Access the rear panel and ensure wire connectors to the control board are secure.
Look for Burnt or Damaged Boards
- If a board looks burnt or smells burnt, it may need replacement.
Call a Technician
- Control board replacements should be handled by qualified professionals.
refrigerator - Tips to Prevent Co Control Board Communication Faults
- Use a voltage stabilizer to protect from surges
- Avoid spilling water near control panel
- Do not open control panel without switching off power
- Keep connectors clean and dry
- Have internal wiring checked annually
Frequently Asked Questions About Co Control Board Communication Fault❓
- Question: Is the Co error dangerous?
- Answer: Not dangerous, but it can stop the refrigerator from working correctly.
- Question: Can I fix the wiring myself?
- Answer: Only if you are experienced with electronics. Otherwise, contact a technician.
- Question: Will a simple reset fix the Co error?
- Answer: Sometimes yes, but if it keeps returning, board inspection is required.
- Question: How much does a control board replacement cost?
- Answer: Typically between ₹2500–₹5000 depending on the board and model.
When to Contact a Technician
If you experience any of the following issues even after completing the recommended troubleshooting steps, please contact an authorized service technician or our support team for further assistance.
- The same error appears repeatedly after restarting or resetting the unit.
- Multiple error codes appear simultaneously.
- The device makes unusual noises, vibrations, or emits a burning smell.
- The product fails to start, operate, or complete its function despite troubleshooting.
- There are signs of electrical issues, physical damage, or leakage.
- An unknown or unlisted error code appears on the display.
Query / Feedback Form
Have a question or concern? Submit your query and we`ll get back to you!