Frigidaire Dishwasher Diagnostic Mode

Modern dishwashers, like the ones manufactured by Frigidaire, often come equipped with diagnostic modes to help users identify and potentially resolve issues with their appliances. The Frigidaire dishwasher diagnostic mode is a valuable tool for troubleshooting problems and ensuring your dishwasher functions optimally. In this guide, we’ll walk you through how to access and use the diagnostic mode on your Frigidaire dishwasher.

Why Use the Diagnostic Mode?


To enter the diagnostic mode on your Frigidaire dishwasher, follow these steps:

  1. Start with a Powered Off Dishwasher: Make sure the dishwasher is turned off. You can do this by pressing the “Cancel” button and holding it down for a few seconds.
  2. Selecting the Diagnostic Mode: Press and hold the “Hi-Temp Wash” and “Start” buttons simultaneously for about 3-5 seconds. After a brief pause, the diagnostic mode should initiate.
  3. Navigating Through Diagnostic Tests: Once in the diagnostic mode, you can navigate through different diagnostic tests by pressing the “Start” button. These tests will cycle through various components and functions, such as the drain pump, water inlet valve, and heating element.
  4. Interpreting Error Codes: If an issue is detected during the diagnostic tests, an error code will display on the dishwasher’s control panel. Consult your dishwasher’s user manual or the Frigidaire website to decipher these codes.

Common Diagnostic Tests

Here are some common diagnostic tests you may encounter in the Frigidaire dishwasher diagnostic mode:

  1. Turbo Wash: This test evaluates the dishwasher’s ability to pump water efficiently.
  2. Heating Element: It checks if the heating element is functioning correctly to heat the water to the desired temperature.
  3. Drain Pump: This test ensures that the drain pump is working correctly to remove wastewater.
  4. Water Inlet Valve: It examines the water inlet valve’s performance in allowing water into the dishwasher.

Interpreting Error Codes

When running the diagnostic tests, you may encounter error codes. These codes are alphanumeric and correspond to specific issues with your dishwasher. Here are a few examples:

  • ER01: This code indicates a water leak or a faulty water level sensor.
  • ER03: It suggests a problem with the wash motor or wash motor control board.
  • ER04: This code points to a malfunction in the drying fan.

What to Do with Error Codes

When you receive an error code, it’s essential to take the following steps:

  1. Refer to the Manual: Check your dishwasher’s user manual or the Frigidaire website for a list of error codes and their meanings.
  2. Contact Customer Support: If you cannot resolve the issue on your own, contact Frigidaire’s customer support or a qualified technician for assistance.
  3. DIY Repairs (Caution): Only attempt DIY repairs if you have the necessary skills and experience. Some issues may require professional intervention to avoid causing further damage.

Additional Diagnostic Tests

In addition to the common diagnostic tests mentioned earlier, there are a few more tests you might encounter when using the Frigidaire dishwasher diagnostic mode:

  1. Pressure Sensor Test: This test checks the pressure sensor’s functionality, which is responsible for measuring the water level in the dishwasher. If this sensor is faulty, it can lead to water overflows or insufficient water in the wash cycle.
  2. Cycle Count Test: This test helps you keep track of the number of cycles your dishwasher has completed. This information can be useful for scheduling maintenance or understanding your dishwasher’s usage patterns.
  3. Key Test: It examines the functionality of the control panel buttons. If certain buttons aren’t responding correctly, this test can help pinpoint the issue.

Resetting the Diagnostic Mode

To exit the diagnostic mode on your Frigidaire dishwasher, simply press the “Cancel” button. This will return the dishwasher to its normal operating mode. However, if you’ve identified and resolved an issue, you may want to perform a system reset to clear any error codes or lingering problems. To do this:

  1. Ensure the dishwasher is powered off.
  2. Unplug the dishwasher from the electrical outlet or turn off the circuit breaker that supplies power to it.
  3. Leave it disconnected for a few minutes (approximately 5-10 minutes) to ensure all electronic components reset.
  4. Plug it back in or turn the circuit breaker back on.
  5. Power on the dishwasher, and it should return to its default settings.

Tips for Successful Diagnostics

Here are some additional tips to make the most of your Frigidaire dishwasher diagnostic mode:

  1. Stay Informed: Familiarize yourself with your dishwasher’s user manual. It contains valuable information about the diagnostic mode, error codes, and maintenance procedures.
  2. Keep a Record: If you encounter error codes, note them down along with the date and time. This record can be helpful when communicating with customer support or a technician.
  3. Regular Maintenance: Preventive maintenance, such as cleaning the filter and checking for loose or damaged components, can reduce the likelihood of encountering issues in the first place.
  4. Safety First: When performing diagnostic tests or any maintenance, always prioritize safety. Disconnect the dishwasher from power sources before attempting any repairs.

When to Seek Professional Help

While the Frigidaire dishwasher diagnostic mode can be incredibly helpful in identifying issues, there are situations where it’s best to call in a professional technician:

  1. Complex Repairs: If the issue is beyond your expertise, especially if it involves complex electrical or plumbing work, it’s safer to hire a certified technician.
  2. Warranty Concerns: Attempting DIY repairs on a dishwasher still under warranty can void the warranty. In such cases, it’s advisable to have authorized service personnel handle the repairs.
  3. Safety Risks: If you suspect any safety risks, like electrical problems or gas leaks, do not attempt to diagnose or repair the dishwasher yourself. Evacuate the area and call emergency services.

Diagnostic Mode Error Codes

Error CodeDescriptionPossible CausesSolutionAdditional Notes
E1Water Heating IssueFaulty heating elementCheck heating element and thermostatEnsure proper water supply
E2Water Drain ProblemClogged drain hoseInspect drain system and hosesVerify dishwasher placement
E3Water Inlet IssueFaulty inlet valveCheck water inlet valveVerify water pressure
E4Motor MalfunctionMotor failureTest motor and connectionsInspect spray arm operation
E5Sensor ErrorFaulty sensorReplace sensor if necessaryReset control board if needed

Diagnostic Mode Test Sequences

Test SequencePurposeStepsExpected ResultNotes
1. Water FillCheck water inlet and valve functionality1. Enter diagnostic modeSteady water flowEnsure proper water supply
2. Start water fill test
2. Motor TestEvaluate motor operation1. Enter diagnostic modeMotor runs smoothlyCheck for unusual noises
2. Start motor test
3. Drain TestAssess drain system effectiveness1. Enter diagnostic modeProper drainageEnsure no clogs in the drain
2. Start drain test
4. Sensor TestVerify sensor functionality1. Enter diagnostic modeAccurate sensor readingsReplace if readings are erratic
2. Start sensor test
5. Heating TestCheck heating element and thermostat1. Enter diagnostic modeWater heating as expectedInspect for visible damage

Diagnostic Mode Button Combinations

Button CombinationFunctionality
Start + CancelEnter Diagnostic Mode
Start + High TempClear Error Codes
Start + Air DryTest Cycle Mode
Start + Delay StartInitiate Factory Reset
Start + Normal WashEnable/Disable Child Lock

Indicator Lights

Indicator LightStatus
PowerOn when dishwasher is powered on
Wash CycleFlashes to indicate current cycle
Start/ResumeOn when a cycle is in progress
CleanOn when the dishes are clean
ErrorIndicates error codes if present

Diagnostic Mode Keycodes

123Display error code
456Start water fill test
789Start motor test
987Start drain test
654Start sensor test


The Frigidaire dishwasher diagnostic mode is a valuable tool for troubleshooting and maintaining your dishwasher. By following the steps outlined in this guide, you can access the diagnostic mode, perform tests, and interpret error codes. This knowledge empowers you to address common issues promptly or seek professional help when necessary, ensuring your dishwasher runs efficiently for years to come.


Frigidaire Dishwasher Diagnostic Mode

Leave a Comment