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Error code · Microwave

JennAir Built-In Message “:” or “.” in display: clock needs setting

On JennAir built-in microwaves, microwave drawers and the microwave side of combination wall ovens, such as the JMC2430LL, JMC2427LL or JMC8130DDS, a colon or a period flashing in the display means the clock needs to be…

Low risk · DIY check OK
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Code
":" or "." in display
Appliance
Microwave
Brand
JennAir
Warranty
30-day workmanship

What ":" or "." in display means

On JennAir built-in microwaves, microwave drawers and the microwave side of combination wall ovens, such as the JMC2430LL, JMC2427LL or JMC8130DDS, a colon or a period flashing in the display means the clock needs to be set. Either there was a power failure, or the clock time was turned off. Nothing is wrong with the microwave itself, and cooking works once you set the time or simply start a cycle.

Common causes of ":" or "." in display

  • Power outage or brownout reset the clock
  • Household breaker was switched off and on
  • Clock display was turned off in the settings
✓ One safe check you can try

1. Look at the display and note whether the colon or period is flashing. 2. Press the Clock key or the setting pad shown for your model and enter the current time. 3. Press Start or Enter to confirm. 4. If you prefer no clock, use the option that turns the clock display off. 5. If the mark returns each day without an outage, call us.

! Why to stop there
  • A flashing colon is not an error, so there is usually nothing to repair.
  • If it resets every day, the cause could be the power supply or the control, which needs testing.
  • Guessing at control parts costs money without helping.
  • When service is needed, we quote the price in writing and cover the work for 30 days.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
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":" or "." in display":" or "." in display questions
Does the flashing colon mean the microwave is broken?

No. It is just a reminder that the clock lost its time or was turned off. Set the time, and the display returns to normal.

Why does the clock reset when nothing seems wrong?

Short outages, storms and breaker trips all reset it, and you may not notice them. Check whether other digital clocks in the house also blinked.

What if the microwave keeps losing the time with no outage?

Then the control may not be holding power correctly, or the supply to the unit is unsteady. Call us and we will check the supply and the control.

Book a visit

Still unsure about ":" or "." in display?

A technician diagnoses it on site and gives you the price in writing before any work starts.

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