MCU overheat #35270

What happened? 

The Modular Bed Control Unit (MCU) monitors temperature to ensure the printer operates within safe limits. When the internal temperature exceeds a defined threshold, the printer displays a warning "Microcontroller unit of %s is overheating", where in place of %s, the name of the component is shown. 

Error name: MCU Overheat

Error code: #35270

How to fix it? 

This warning typically appears when the ambient temperature around the printer is too high, or when the printer is enclosed without proper ventilation. 

• Ensure the printer is used in an environment with ambient temperature below 30 °C (86 °F).
• Allow the printer to cool down: turn it off and let it rest for at least 10–15 minutes before continuing.
• Minimize continuous long-duration prints at high bed temperatures, especially in warm environments.

If the issue persists even in a cool environment, contact our Support for further diagnostics, as the internal sensors or electronics may be faulty.