Machine powers on but does not heat; both brew and steam functions remain cold, no error code displayed.

Safety: Unplug and allow the machine to cool completely.

• Check high‑limit thermostats: Locate the manual‑reset thermostats on the brew and steam boilers. Press the reset buttons if present. Restore power and test.
• Inspect heater wiring: Verify that all heater terminals are firmly connected and not burnt. Repair or replace damaged connectors.
• Test thermal fuse: Some models use an inline thermal fuse on the heater circuit. Test for continuity and replace if open, investigating the cause of overheating.
• Control board relay: If all safety devices are intact, the heater enable relay on the control board may have failed. Replacement of the board is usually required.