E05 is shown and the machine does not heat water; no steam or hot coffee.

Safety first: Unplug the coffee maker. Do not attempt to use it until the heating fault is resolved; risk of electric shock and fire.

• Allow full cool-down: Wait at least 30 minutes to ensure the boiler or thermoblock is cool.
• Power reset: Plug back in and try a rinse or brew cycle. If E05 appears immediately, the control has detected a permanent heater fault.
• Check for tripped home breaker: If the circuit breaker tripped when the error first occurred, the heater may be shorted.
• Visual inspection (advanced): If you are experienced, remove the rear cover and inspect the thermoblock or boiler assembly. Look for burnt connectors, melted insulation, or a blown thermal fuse clipped to the heater body.
• Do not bypass safety devices: Never short the thermal fuse or thermostat. These are critical safety components.
• Service required: Heating element or thermal fuse replacement requires disassembly and proper electrical insulation checks. Contact a qualified Kenwood service technician.