Machine shows E05, does not heat water, coffee is cold or brewing does not start.

Safety first: Disconnect from mains and wait for the machine to cool completely. Heating circuits carry dangerous voltages.

Descale first:

• If the machine still heats slightly or intermittently, run a full descaling cycle to remove scale that can cause overheating and thermal fuse trips.

Internal diagnostics (advanced):

• Remove the covers to access the thermoblock or boiler assembly.
• Visually inspect for burnt wiring, discolored connectors, or a tripped thermal fuse mounted on the heater body.
• With the unit unplugged, measure continuity across the heating element terminals. An open circuit indicates a failed heater.
• Check continuity across the thermal fuse; if open, it must be replaced with an identical temperature and current rating component.
• Inspect the main PCB for burnt tracks or a failed heater triac/relay; this typically requires board-level repair skills.

Replacing the thermoblock or heater assembly is often the most reliable repair. If you are not experienced with mains-voltage repairs, contact an authorized Beko service center.