Flashing lights on a Whirlpool dishwasher control panel serve two different purposes depending on the model. On pre-2010 models without a digital display, blinking lights ARE the fault codes , count the flashes before and after each pause to decode the fault. On post-2010 DTM platform models, all lights flashing at once typically indicates a communication error, a control lock condition, or a power reset state.
Flashing lights mean the machine is trying to tell you something, and if you ignore it you might end up with a dishwasher that won't run at all or one that keeps tripping mid-cycle. I've shown up to jobs where the homeowner waited a week and the control board fried itself from repeated fault loops. Usually this is a quick fix, but you've got to read the blinks right first.
WhirlpoolDishwasherSeverity: low75% DIY Success
Time to Fix
2–15 min
Difficulty
beginner
Parts Cost
—
Tools Needed
Pen and paper (for counting blink patterns on older models), Phillips #2 screwdriver (if replacing door latch assembly)
What Does the LIGHTS-FLASH Code Mean?
I've spent plenty of time in kitchens counting blinks because Whirlpool didn't always give us a handy digital screen. These flashing lights are actually a coded language. If every light is blinking at once, the board is likely overwhelmed by a voltage spike or a communication failure. If only one or two lights are pulsing, the machine is waiting for you to close the door or clear a previous error.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Control board fault code being displayed via blink pattern (older models)40%
Power surge causing all panel lights to flash simultaneously24%
Cycle interrupted by door opening causing status lights to flash22%
Control lock engaged on some models causes flashing14%
Symptoms You May Notice
Every single light on the control panel blinking at the same time, usually at a steady rhythm, right after the power came back on from an outage.
The Clean light blinks a specific number of times, pauses, then blinks again in a repeating pattern while the machine ignores every button you push.
The Start light flashes and nothing happens when you press it, or it resets right back to flashing two seconds later.
Panel feels completely dead except for the blinking, buttons don't respond at all.
Dishwasher randomly kicks on and starts draining by itself and then the lights start going, usually because a cycle got interrupted mid-run.
Can you reset a Whirlpool dishwasher to clear the LIGHTS-FLASH code?
Start by pressing the Cancel or Drain button once and wait two minutes for the pump to finish. If the lights keep dancing, hold that same button down for a full three seconds. For the stubborn cases where the panel is completely frozen, I usually trip the circuit breaker for ten minutes to let the capacitors on the control board fully discharge and clear the memory.
Tools Required for Diagnosis
Pen and paper (for counting blink patterns on older models)Phillips #2 screwdriver (if replacing door latch assembly)Flashlight or phone lightMultimeter (optional, for testing door latch switch continuity)
Service / Diagnostic Mode
On most Whirlpool dishwashers without a display, press Heated Dry, Normal, Heated Dry, Normal within 5 seconds then close the door. The machine runs a test sequence and cycles through components. Sequence varies by model so check your service manual if this doesn't work.
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
Frequently Asked Questions
Why are all the lights on my Whirlpool dishwasher flashing at the same time?
When every single LED is strobing at once, the control board is usually reporting a communication failure or a UI lockup. This almost always happens after a thunderstorm or a brownout. Try the breaker flip first. Turn the power off at your electrical panel for a full ten minutes, not thirty seconds, ten minutes. This forces the processor to do a full cold reboot and clears the sync error between the button panel and the main control board. If it keeps coming back after multiple resets, you're probably looking at a failing control board or UI board. Those run $80-$200 depending on the model.
What does it mean when the Start and Clean lights both flash?
This specific combo usually means the dishwasher thinks the door was opened during a critical part of the cycle. On most Whirlpool models, if you don't hit Start within a few seconds of closing the door back up, it'll just sit there blinking at you. Press Cancel to clear it, close the door firmly and hit Start within three seconds. If it keeps happening, your door latch is probably starting to fail. I replaced three of them last month on WDT series models, it's a really common wear item on machines that are five or more years old.
How do I decode the blink codes on my older Whirlpool dishwasher without a display?
On older Whirlpools without a screen, the Clean light (sometimes Start) blinks out a two-digit code. Count the first group of blinks, then count the second group after the pause. Seven blinks then one blink is code 7-1, heating element fault. Six blinks then two is 6-2, inlet water issue. Three blinks then one is 3-1, pump motor problem. Write down exactly what you count and search for your model number plus that blink code to find the right fix. Count it at least three times because one missed blink and you're diagnosing the wrong thing entirely.
Can I keep using my dishwasher while the lights are flashing?
Nope. When lights are flashing the machine is in a fault or suspended state and it won't start a cycle anyway. Even if you could somehow force it to run you'd want to know what's triggering the fault first. If the float switch is active because water collected in the base, running the machine makes it worse. Try the Cancel hold, then the full breaker reset. If those two things don't fix it within 15 minutes you've got a parts issue and you should hold off until you figure out what's actually broken.
How much does it cost to fix flashing lights on a Whirlpool dishwasher?
Depends totally on what's causing it. If it's control lock or a soft reset, that's free and takes two minutes. Door latch assembly is $25-$45 in parts and you can swap it yourself in 20 minutes. UI board failure runs $60-$120 for the part. Main control board is the expensive one, $100-$200 for the part, and if you hire a tech you're looking at $250-$350 total for the visit. Honestly if the machine is more than 8-10 years old and needs a control board, think hard about whether to repair or just replace it.
Is there a diagnostic mode I can run on my Whirlpool dishwasher?
Yeah, most Whirlpool dishwashers have a service diagnostic mode built in. The most common sequence is Heated Dry, Normal, Heated Dry, Normal pressed quickly within about five seconds, then close the door. The machine runs through a test cycle and the lights cycle in a specific pattern while each component activates. Some models use a different key combo so check your model number against the service manual if that one doesn't trigger anything. The diagnostic mode basically runs every component in sequence so you can watch and listen for whichever one fails or acts weird.