Error Code 18
WiFi smart home module lost communication with main control board
Minor
Usually easy to fix - may resolve on its own
Also displayed as: 52 (RR39/RR14/RZ32/RZ11/RQ32)
What This Means
WiFi module connector disconnected; Communication signal line failure; WiFi module malfunction; Main PCB communication circuit fault; Serial protocol error
What actually causes this:
The WiFi module that connects the refrigerator to the smart home app became unplugged or the communication wire failed
First Thing to Check
If the refrigerator has a WiFi module, check that it is fully plugged into the connection port on the main board
Parts Involved
How to Fix
- 1
Check WiFi module connector seating
- 2
Verify communication wiring continuity
- 3
Inspect for corrosion on pins
- 4
Test module with diagnostic functions
This Error Applies To
Samsung RR39T74 Series Refrigerators
Related Error Codes
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Freezer defrost heater circuit malfunction or stuck heater
Compressor power control IC fault or compressor winding fault detected