SLOW RED FLASHING (ON TOOL)
Milwaukee
Thermal Overload Protection
Vacuum runs briefly then stops; LED flashes red slowly and repeatedly.
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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
Overheated motor due to restricted airflow, Operating vacuum continuously at maximum load, Blocked cooling vents on motor housing, Failing motor bearings causing excess heat
How to Fix / Troubleshooting
Safety first: Remove the battery and allow the unit to cool before further inspection.
- 1. Cool down: Leave the vacuum powered off with battery removed for at least 20–30 minutes to allow the thermal protector to reset.
- 2. Clear airflow path: Empty the dust canister and clean the filter thoroughly. Check hose, wand, and nozzle for obstructions.
- 3. Inspect cooling vents: Examine the motor housing and side vents for dust buildup. Use compressed air (short bursts) to blow out vents while keeping the fan from overspinning.
- 4. Reduce duty cycle: Avoid running the vacuum continuously at full load for long periods; allow short breaks during heavy cleanup.
- 5. Check for bearing noise: Spin the motor/fan by hand (if accessible) and listen for grinding. If noisy or stiff, replace the motor/fan assembly.
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Repair Difficulty
Medium
3/5
Required Part
Motor/Fan Assembly
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