⚠
warning Tesy
Error Code LED blinks 3 times
Overheating detected — internal temperature too high.
? What Causes This
Blocked ventilation or fan failure.
✓ How to Fix It
- Turn off the unit and let it cool.
- Clear any obstructions around vents.
- If persists, contact service.
Source: page 50 of the official manual
From the manual
This error code appears in:
Tesy Electric Water Heater