E15
Termet
Internal Control Board Error
Heater shows E15, may occur intermittently, sometimes after power surges or lightning.
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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
Corrupted firmware on Termet main PCB, Damage from power surge, Internal microcontroller fault, Poor earthing causing electrical noise
How to Fix / Troubleshooting
Safety: Isolate the appliance from mains before inspection.
- Power reset: Turn OFF the heater at the main switch or breaker for at least 2 minutes, then restore power and test.
- Check earthing: Ensure the earth connection is secure and that the supply is within voltage limits.
- Surge protection: Consider installing a surge protector to protect the Termet electronics.
- Board replacement: If E15 recurs, the main control board is likely damaged and should be replaced by an authorized Termet technician. Firmware updates, if available, must be performed with Termet service tools.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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