Tower
Faulty Mode Selector or Control PCB
Vacuum randomly changes power level or switches between modes without user input.
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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
Stuck or contaminated mode button, Moisture ingress into control panel, Failing control PCB, Electrostatic discharge damage
How to Fix / Troubleshooting
Safety first: Remove the battery before working on the control panel.
- Step 1 – Dry the unit: If the vacuum was exposed to moisture, allow it to dry in a warm, ventilated area for 24 hours (battery removed).
- Step 2 – Clean buttons: Wipe around the mode buttons with a slightly damp cloth and then dry. Avoid liquid entering the panel.
- Step 3 – Inspect control PCB (if accessible): Open the control panel area and look for corrosion or residue. If present, the PCB should be replaced.
- Step 4 – Replace control module: Install a new Tower main control PCB / user interface board if random mode changes persist.
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Repair Difficulty
Hard
4/5
Required Part
Tower Main Control PCB / User Interface Board
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