Vacuum does not start and E5 appears on the display when the power button is pressed.

Safety first: If the battery feels hot to the touch, disconnect it from the vacuum and charger immediately. Place it on a non-flammable surface away from flammable materials.

• Allow to cool: Let the battery cool at room temperature for at least 1 hour. Do not place it in a refrigerator or freezer.
• Check charging environment: Ensure the Sencor charging base is in a cool, well-ventilated area away from direct sunlight or heat sources.
• Inspect battery contacts: Look for corrosion or discoloration on the battery and vacuum contacts. Clean gently with a dry cloth.
• Retry operation: After cooling, reinstall the battery and try to start the vacuum. If E5 reappears immediately, the temperature sensor or battery cells may be defective.
• Replace battery pack: Do not attempt to open the battery pack. Replace it with an original Sencor lithium-ion battery pack specified for your model. If the new pack also shows E5, the main control PCB may be misreading temperature and needs professional diagnosis.