E12
Avenli
Overvoltage / Undervoltage Power Supply Fault
E12 error and the spa shuts down unexpectedly, often when multiple functions are used together (heat + bubbles).
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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
Supply voltage outside specified range, Undersized extension cord, Loose mains plug, Internal power supply fault on control PCB
How to Fix / Troubleshooting
Safety first: Always connect the spa to a properly grounded outlet with correct voltage and RCD/GFCI protection.
- Check power source:
- Verify the outlet voltage matches the rating on the Avenli spa label.
- Avoid using long or thin extension cords; they can cause voltage drop.
- Inspect plug and cord:
- Check the power cord for damage, cuts, or overheating at the plug.
- Ensure the plug fits tightly in the outlet.
- Try a different outlet: Connect the spa directly to a known-good outlet on a dedicated circuit if possible.
- Persistent E12: If the supply is stable and E12 continues, the internal low-voltage power supply on the main control PCB may be faulty. Replace the control box assembly.
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Repair Difficulty
Medium
3/5
Required Part
Power Cord and Main Control PCB
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