Error code · Microwave

Whirlpool Countertop Microwave Colon Flashing: Normal Clock Setting

Low risk · DIY check OK

Code: Colon Flashing
Appliance: Microwave
Brand: Whirlpool
Warranty: 30-day workmanship

What Colon Flashing means

On Whirlpool countertop microwaves such as model WMC30516HZ, a flashing colon between the digits in the display is normal. It flashes while the time is being set, so it is a signal that the clock is waiting for you, not an error. There is nothing wrong with the oven. Owners often see it after the power returns following an outage, or when they first plug the microwave in, and think something has failed when nothing has.

Common causes of Colon Flashing

Clock is in time-setting mode
Power was interrupted and the clock restarted
No error is indicated

✓ One safe check you can try

1. Follow the clock-setting steps in your owner's manual for your model. 2. Enter the correct time and confirm it. 3. Check that the colon stops flashing and the time stays steady. 4. If the colon keeps flashing after the time is set, unplug the microwave for a short while and plug it back in, then set the clock again.

! Why to stop there

If the clock resets itself over and over, we check whether the power outlet or the control is the cause.
A flashing colon alone never needs a repair; a microwave that will not heat or respond does.
If something else is wrong with the oven, we diagnose it and quote the price in writing first.

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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Colon FlashingColon Flashing questions

Is a flashing colon an error code?

No. It flashes while the time is being set and is normal. It is a cue to enter the clock time, not a warning about the microwave.

Why did the colon start flashing after a storm?

A power outage resets the clock, and the display flashes the colon until you set the time again. That is expected behavior for the oven.

When should I call you about the display?

Call if the oven shows a real error code, will not heat, or loses the time every day with a steady outlet. We then test it and give you a written price.

Book a visit

Still unsure about Colon Flashing?

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

(713) 589-6107