C1
TCL
Tilt / Roll Sensor or Safety Switch Triggered
Vacuum shows C1 and may not start; often after a drop or impact.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Internal tilt sensor stuck, Impact causing misalignment of safety switch, Loose internal connector to safety sensor, Firmware misreading sensor state
How to Fix / Troubleshooting
Safety first: Remove the battery before shaking or tapping the unit.
- 1. Place on flat surface: Set the vacuum upright on a level floor and leave it for 1–2 minutes, then try powering on.
- 2. Gentle tap: With the battery removed, gently tap the side of the main body to free a stuck tilt sensor ball (if used in your model).
- 3. Soft reset: Reinsert the battery and hold the power button for 10–15 seconds to reset the control board.
If C1 persists: The internal tilt/safety sensor or its wiring may be damaged and should be inspected and replaced by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Tilt / Safety Sensor
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