Machine displays E05 and stops; often occurs during or after steaming milk or dispensing hot water.

Safety: Unplug the machine and allow it to cool for at least 30 minutes before working on it.

• Allow full cool-down: Sometimes E05 is triggered by temporary overheating. Leave the machine unplugged until it is completely cool, then restart.
• Descale thoroughly: Run a complete descaling cycle using Philips/Saeco descaler. Pay special attention to the steam/hot water circuit by running extra hot water and steam after descaling to flush out loosened scale.
• Clean steam wand or milk system: If your Philips model has a classic steam wand or LatteGo system, disassemble the removable parts and soak them in warm water with a bit of descaler. Blockages here can cause overheating.
• Ventilation: Ensure the machine has adequate ventilation around it and is not placed in a confined cabinet where heat accumulates.

If E05 reappears quickly, the NTC sensor, thermal fuse, or thermoblock may be defective. Replacing these components involves working near mains voltage and pressurized hot water; this should be done by a qualified technician.