Vacuum will not power on; display shows E1 shortly after pressing the power button

Safety first: Ensure the vacuum is switched off and the battery pack is removed before opening any covers. Do not short battery terminals.

• Check the battery seating: Remove the battery pack from the Progress cordless vacuum and reinsert it firmly until it clicks. Inspect the battery rails and contacts on both the pack and the vacuum body for bent pins, corrosion, or debris. Clean gently with a dry cloth.
• Test with another battery (if available): If you have another compatible Progress battery pack, install it and try powering on. If E1 disappears, the original battery pack is likely faulty.
• Inspect the main power switch: On many Progress cordless models, the trigger or slide power switch connects via a small harness to the control PCB. Remove the dust bin and any accessible covers to visually inspect the switch area for broken plastic, loose wiring, or signs of overheating. If the switch feels loose or does not click, it may need replacement.
• Check for obvious shorts: Look around the motor housing and wiring harness for melted insulation or pinched wires. If you see damage, do not continue using the vacuum; the control PCB and/or motor assembly may need replacement.
• When to call a technician: If reseating the battery and inspecting the switch do not clear E1, the control PCB or motor assembly is likely defective. These parts are high-voltage DC components; replacement should be done by a qualified technician or service center.