Symptoms
- Vacuum doesn't respond at all when switched on
- Vacuum clicks but doesn't start
- Vacuum shuts off shortly after starting
- Vacuum worked fine recently then suddenly stopped
Likely causes
- CommonOutlet, cord, or extension cord issueNo power reaching the tool is the most common and easiest cause to fix.
- CommonTank float switch stuck or triggeredA full tank or a stuck float ball can prevent the motor from running as a safety feature.
- PossibleThermal overload tripped from overheatingSome vacs shut down and need time to cool before they'll restart.
- Less commonWorn motor brushes or internal failureLike other corded tools, brushes wear out over years of use.
What to do
- Test the outlet with another device and try a different outlet or extension cord.
- Empty the tank completely and check that the float ball or shutoff mechanism moves freely, especially after wet pickup use.
- Let the vacuum sit unplugged for 30 minutes in case a thermal overload has tripped, then try again.
- Check the power cord for cuts, kinks, or a damaged plug.
- Listen for any humming or clicking when switched on, which can indicate an electrical issue versus a completely dead unit.
- If accessible, inspect motor brushes for wear if the vacuum is a serviceable model.
- Replace the vacuum if none of these steps restore power, since most consumer shop vac motors aren't cost-effective to professionally repair.
Tools and parts
- Outlet tester or another device to test power
Replacement shop vacSearch: “wet dry shop vacuum”
When to call a pro
A small appliance repair shop can test the motor and switch if the vacuum is otherwise in good condition and worth repairing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.