Dishwasher Control Display Lights Flashing or Blinking: Common Causes and How to Fix It

When the lights on your dishwasher are flashing or blinking, it usually indicates that the appliance has detected a problem. Depending on the dishwasher brand and model, blinking lights may signal a control issue, a failed component, a cycle interruption, or the need to reset the appliance.

A flashing dishwasher control panel does not always mean a major repair is needed. In many cases, the issue can be resolved by resetting the dishwasher, checking for simple problems, or replacing a faulty component.

Below are the most common causes of dishwasher lights flashing or blinking and the recommended solutions.

1. Dishwasher Needs to Be Reset

Most Common Solution

Why It Causes Flashing Lights

A dishwasher control board can sometimes become temporarily locked or experience a software error. A power interruption, incomplete cycle, or electrical surge may cause the control panel lights to flash.

Resetting the dishwasher can clear minor electronic errors and restore normal operation.

How to Reset a Dishwasher

  1. Turn off power to the dishwasher at the circuit breaker.
  2. Wait approximately 5 minutes to allow the control board to fully reset.
  3. Restore power to the dishwasher.
  4. Select a wash cycle and start the dishwasher.
  5. Check if the lights continue flashing.

If the lights return after resetting, additional troubleshooting may be required.

2. Dishwasher Control Board

Common Solution

Why It Causes Flashing Lights

The main control board manages all dishwasher functions, including wash cycles, water filling, draining, heating, and control panel communication.

A faulty control board may cause:

  • Flashing or blinking lights
  • Buttons not responding
  • Dishwasher stopping during a cycle
  • Incorrect cycle operation
  • Random error codes

Before replacing the control board, check other common causes such as door latch problems, power issues, and failed components.

How to Replace a Dishwasher Control Board

  1. Disconnect power to the dishwasher at the circuit breaker.
  2. Remove the lower access panel or control panel cover depending on the model.
  3. Locate the main control board housing.
  4. Take a photo of wire connections for reference.
  5. Disconnect the wiring harnesses from the old control board.
  6. Remove mounting screws or clips holding the board.
  7. Install the replacement control board.
  8. Reconnect all wires in their original positions.
  9. Secure the control panel or access cover.
  10. Restore power and test dishwasher operation.

Find Dishwasher Control Board Parts
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3. Dishwasher Door Latch or Door Switch

Why It Causes Flashing Lights

The dishwasher door latch confirms that the door is properly closed before the appliance begins operation. If the latch or door switch fails, the dishwasher may stop running and display blinking lights.

Common symptoms include:

  • Dishwasher starts and stops immediately
  • Flashing start light
  • Buttons appear to work but cycle will not begin
  • Dishwasher will not continue after closing the door

How to Replace a Dishwasher Door Latch

  1. Disconnect power to the dishwasher.
  2. Open the dishwasher door.
  3. Remove the inner door panel screws.
  4. Separate the inner and outer door panels.
  5. Disconnect the wiring connector from the latch assembly.
  6. Remove the old door latch.
  7. Install the replacement latch assembly.
  8. Reconnect wiring.
  9. Reassemble the door panel.
  10. Restore power and test the dishwasher.

4. Dishwasher Touchpad or Control Panel

Why It Causes Flashing Lights

The touchpad and control panel allow the user to select cycles and communicate with the control board. A damaged keypad, moisture exposure, or worn buttons can cause lights to blink or prevent normal operation.

Signs of a faulty control panel include:

  • Certain buttons not responding
  • Lights flashing without starting a cycle
  • Incorrect cycle selections
  • Intermittent operation

How to Replace a Dishwasher Control Panel

  1. Disconnect power from the dishwasher.
  2. Remove screws securing the inner door panel.
  3. Separate the control panel from the door assembly.
  4. Disconnect the control panel wiring connector.
  5. Remove the old panel.
  6. Install the replacement control panel.
  7. Reconnect wiring.
  8. Secure the panel in place.
  9. Restore power and test all buttons.

5. Dishwasher Has an Error Code

Why It Causes Flashing Lights

Many dishwashers use flashing lights to indicate an error condition. The blinking pattern may represent a specific fault, such as:

  • Water not entering the dishwasher
  • Drain failure
  • Heating problem
  • Door latch failure
  • Sensor malfunction

Solution:

  1. Check your dishwasher display or light pattern.
  2. Look up the error code for your specific model.
  3. Inspect the related component.
  4. Replace the defective part if necessary.

Always verify the exact error code before replacing parts.

6. Dishwasher Water Supply Problem

Why It Causes Flashing Lights

If the dishwasher cannot fill with water, the control system may stop the cycle and flash lights as a warning.

Possible causes include:

  • Closed water supply valve
  • Kinked inlet hose
  • Clogged inlet screen
  • Faulty water inlet valve

How to Fix a Water Supply Problem

  1. Confirm the water supply valve under the sink is fully open.
  2. Inspect the inlet hose for kinks or damage.
  3. Clean debris from the water inlet screen.
  4. Test the water inlet valve.
  5. Replace the valve if it is defective.

7. Dishwasher Drain Problem

Why It Causes Flashing Lights

A dishwasher that cannot drain properly may stop the cycle and display blinking lights.

Common causes:

  • Clogged filter
  • Blocked drain hose
  • Failed drain pump
  • Garbage disposal connection issue

Solution:

  1. Remove and clean the dishwasher filter.
  2. Check the drain hose for blockages.
  3. Inspect the drain pump for debris or damage.
  4. Verify the garbage disposal connection.
  5. Replace the drain pump if it has failed.

8. Dishwasher Heating Element Problem

Why It Causes Flashing Lights

The heating element is responsible for heating water and drying dishes. If the element fails, some dishwashers may stop the cycle and flash indicator lights.

Signs of a heating problem:

  • Dishes remain wet
  • Water is not hot
  • Dishwasher stops before completing the cycle
  • Error lights appear

How to Fix a Heating Element Problem

  1. Disconnect power to the dishwasher.
  2. Inspect the heating element for cracks or damage.
  3. Test the element for continuity.
  4. Replace the heating element if it fails testing.
  5. Run a test cycle.

9. Dishwasher Float Switch or Water Level Sensor

Why It Causes Flashing Lights

The float switch monitors the water level inside the dishwasher. If it detects an incorrect water level, the dishwasher may stop operation and flash lights.

Possible causes:

  • Stuck float
  • Dirty float assembly
  • Faulty water level sensor

Solution:

  1. Remove the lower dish rack.
  2. Locate the float assembly inside the dishwasher tub.
  3. Make sure the float moves freely.
  4. Clean any debris around the float.
  5. Replace the float switch if it does not operate correctly.

10. Dishwasher Electrical Power Issue

Why It Causes Flashing Lights

Electrical problems can interrupt communication between dishwasher components and cause blinking lights.

Possible causes:

  • Loose wiring connection
  • Damaged power cord
  • Tripped circuit breaker
  • Voltage issue

Solution:

  1. Check that the dishwasher has consistent power.
  2. Reset the circuit breaker.
  3. Inspect wiring connections.
  4. Repair damaged wiring if necessary.
  5. Contact a qualified technician for electrical issues.

11. Dishwasher Stuck in Demo or Control Lock Mode

Why It Causes Flashing Lights

Some dishwashers have a control lock or showroom mode that disables normal operation. When activated, the control panel may flash or respond differently.

Solution:

  1. Check your dishwasher manual for control lock instructions.
  2. Press and hold the designated button combination.
  3. Disable demo mode if activated.
  4. Test normal dishwasher operation.

Preventing Dishwasher Light Problems

To reduce future control panel issues:

  • Avoid interrupting dishwasher cycles frequently.
  • Keep the control panel dry.
  • Use proper voltage protection if needed.
  • Clean filters regularly.
  • Address error codes early.
  • Replace worn components before complete failure.

Find the Correct Dishwasher Replacement Part

Flashing or blinking dishwasher lights are usually caused by a control issue, door latch problem, water supply issue, drain problem, or failed internal component.

Before ordering replacement parts, always verify your dishwasher model number to ensure the correct fit and compatibility.

At Authentic Appliance Parts, we provide quality dishwasher replacement parts and repair guides to help you troubleshoot and complete appliance repairs with confidence.