Breville espresso machine does not heat; water comes out cold or lukewarm.

Safety: Unplug before opening the case. Heating circuits carry mains voltage.

Steps:

• Confirm that the machine is set to brew mode and allowed sufficient warm-up time.
• Run a descale cycle to remove any scale that may affect temperature sensing.
• If still cold, open the case and test the thermoblock element for continuity with a multimeter.
• Check the thermal fuse and thermostat for continuity; replace if open.
• Inspect the NTC sensor wiring and replace the sensor if readings are out of specification.

Resolution: Replace the thermoblock assembly if the element is open or leaking. If all components test good, the control board may not be energizing the heater and should be evaluated by a technician.