E13
Sime
Communication Error Between Control Board and User Interface
Sime water heater intermittently shows E13; unit may continue to operate with reduced performance.
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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
Loose display cable, Faulty user interface PCB, Electrical noise on communication line, Main PCB fault
How to Fix / Troubleshooting
Safety: Isolate power before removing the front panel or accessing electronics.
Steps:
- Check display cable: Remove the front cover and locate the ribbon or plug cable between the main PCB and the display/control panel. Reseat both ends.
- Inspect for moisture: Look for signs of condensation or water ingress around the control panel. Dry gently if present and address any leaks.
- Power reset: Leave the unit powered off for 5 minutes, then restore power and test.
Professional help: If E13 persists, the user interface board or main control board may need replacement and should be diagnosed by a professional.
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Repair Difficulty
Medium
3/5
Required Part
User Interface PCB
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