Symptoms
- Clock reverts to 12:00 or blank periodically
- Happens even when you haven't unplugged the unit
- Other appliances may show similar resets, suggesting a house-wide issue
- Microwave otherwise functions normally
Likely causes
- CommonBrief power flickers in the homeShort outages too quick to notice otherwise can still reset an appliance clock.
- PossibleMicrowave on a circuit with intermittent connection issuesA loose outlet or wiring issue can cause repeated brief power loss.
- Less commonFailed control board componentLess commonly, an internal fault causes the clock specifically to lose its setting.
What to do
- Check if other clocks or electronics in the kitchen also reset around the same times, which points to a house power issue rather than the microwave.
- Test the outlet by plugging in a lamp or another device and watching for any flickering over a day.
- Make sure the microwave's plug is fully seated in the outlet and the outlet itself isn't loose or worn.
- If it's isolated to just the microwave and happens often, note the frequency and any pattern, like time of day or after specific appliance use nearby.
- Reset the clock and monitor over the next few days.
- If it's isolated to the microwave with a confirmed stable outlet, a technician can check the control board.
When to call a pro
If the outlet and household power are confirmed stable but the clock keeps resetting, an appliance technician can check the control board.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.