Smart plug turns off by itself: unexpected shutoff can come from schedules, energy limits, overload/overheat protection, button presses or connectivity—not necessarily a cloud command. Check the plug's activity history and the schedules and automations that list the plug. Compare the wattage on the appliance with the plug's rated maximum and try a small lamp instead.
Differential
Likely causes of “Smart plug turns off by itself”, and how to tell them apart
- 1
A schedule, timer or automation is switching it off
What separates it The plug goes off at similar times of day and the app or hub history shows a command from a schedule, scene or rule.
How to confirm Check the plug's activity history and the schedules and automations that list the plug.
- 2
The attached load is above the plug's rating and its protection trips
What separates it The plug goes off when a heater, kettle or air conditioner runs and comes back only after a manual reset, and the plug feels warm.
How to confirm Compare the wattage on the appliance with the plug's rated maximum and try a small lamp instead.
- 3
The plug loses Wi-Fi and reverts to a default state
What separates it The plug goes off, or the app shows it offline, at the moment the router restarts or the signal drops.
How to confirm Note whether the plug's default power-on or off state after a loss of connection matches what you see.
- 4
The button or a child or pet is pressing it
What separates it The plug turns off and no command appears in the history, and the physical button is easily reached.
How to confirm Check whether the history shows a local press and whether the button can be locked.
Before you touch a setting
Record this first — changing settings destroys the evidence
- The times it turns off and whether they repeat, and what is plugged into it.
- The plug's history entries for each off event: schedule, voice, app, local button or unknown.
- The wattage of the connected device and the plug's stated maximum.
Try in this order
0 of 4 completedCapture the exact symptom
ReversibleReview activity history, schedules and attached-load wattage; feel only the exterior for abnormal heat.
Run the smallest isolation test
ReversibleRemove automations, test with a small supported lamp and connect directly to a grounded outlet.
Correct only the proven cause
ReversibleCorrect the schedule/load or replace the plug if protection trips below rating.
Verify before changing anything else
ReversibleRun the small load through the previous failure window and confirm state remains on.
Stop boundary
When this stops being a self-service repair
- !Stop using the plug and unplug it if it feels hot, smells of burning or shows melted plastic, and do not use it for a heater or another high-load device it is not rated for.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Can a smart plug run a space heater?+
Only if the plug's rating clearly covers the heater's full wattage and the maker allows it for heating appliances. Many plugs do not, so read the rating and the manual.
Why does a smart plug turn off by itself?+
Schedules, routines, automations, an overload protection or a power fault could turn it off. Check the app for active rules first.
Could it be overheating?+
Yes. Plugs have limits on what they can supply. Do not plug in a heater or device that exceeds the plug's rating.
Could the Wi-Fi be at fault?+
A weak connection can cause commands to fail or a plug to reset. Move it closer to the router.