Whirlpool Refrigerator Diagnostic Mode: Troubleshooting Guide

To enter the Whirlpool Refrigerator Diagnostic Mode, press and hold the temperature control button and the door switch button simultaneously for five seconds. This will allow you to access the diagnostic mode and troubleshoot any issues with your refrigerator.

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Understanding The Whirlpool Refrigerator Diagnostic Mode

Understand the Whirlpool Refrigerator Diagnostic Mode with step-by-step instructions on how to enter this mode to troubleshoot issues and read error codes. Learn how to activate different modes and perform diagnostic tests to ensure the proper functioning of your Whirlpool refrigerator.

What is the Whirlpool Refrigerator Diagnostic Mode?

In the Whirlpool Refrigerator Diagnostic Mode, you can access a range of features that allow you to troubleshoot and identify any issues with your refrigerator. This model provides a deeper level of insight into the inner workings of your appliance, giving you the ability to diagnose problems more accurately.

By activating the Diagnostic Mode, you can test various components and functions of your Whirlpool refrigerator to determine if they are working properly. This is a valuable tool for both homeowners and appliance technicians, as it can save time and money on repairs.

How Does the Diagnostic Mode Help in Troubleshooting?

The Whirlpool Refrigerator Diagnostic Mode offers several benefits when it comes to troubleshooting issues with your appliance. By entering the diagnostic mode, you can:

Test individual components: The Diagnostic Mode allows you to run tests on specific parts of your refrigerator, such as the compressor, fan motors, and thermistors. This helps you determine if any of these components are faulty and need to be replaced.

Access error codes: If your Whirlpool refrigerator is experiencing a problem, the Diagnostic Mode can provide you with error codes that indicate the source of the issue. These codes can help you pinpoint the exact problem and take the necessary steps to fix it.
Check for software updates: In some cases, software updates may be available for your Whirlpool refrigerator. By accessing the Diagnostic Mode, you can check if any updates can improve the performance and functionality of your appliance.
Reset settings: If you have made changes to the settings of your refrigerator and want to revert to the default settings, the Diagnostic Mode allows you to easily reset the appliance.

Benefits Of Using The Diagnostic Mode For Whirlpool Refrigerators

The diagnostic mode for Whirlpool refrigerators offers several advantages that make it a valuable tool for troubleshooting. Some of the benefits include:

Accurate diagnosis: By running tests and accessing error codes, you can accurately identify the cause of any issues with your refrigerator. This helps you avoid unnecessary repairs and saves you time and money.
Convenience: The Diagnostic Mode gives you the ability to diagnose and troubleshoot your Whirlpool refrigerator without having to call a technician. This can save you the hassle of scheduling appointments and waiting for someone to come and assess the problem.

Time-saving: With the Diagnostic Mode, you can quickly identify the source of a problem, allowing you to take immediate action. This eliminates the need for trial-and-error troubleshooting and speeds up the repair process.
Avoidance of further damage: By detecting and addressing issues early on, you can prevent them from escalating and causing additional damage to your refrigerator. This prolongs the lifespan of your appliance and reduces the likelihood of costly repairs in the future.
Increased control: The Diagnostic Mode puts you in control of your Whirlpool refrigerator’s maintenance and repair. You can assess the situation, make informed decisions, and take the necessary steps to resolve any problems.

The Whirlpool Refrigerator Diagnostic Mode is a valuable feature that allows users to troubleshoot and diagnose issues with their appliances. By accessing this mode, you can test components, access error codes, and reset settings, all of which contribute to accurate diagnosis, convenience, time-saving, damage prevention, and increased control over your refrigerator’s maintenance and repair.

Accessing The Whirlpool Refrigerator Diagnostic Mode

To access the Whirlpool Refrigerator Diagnostic Mode, simply press and hold the temperature control and door switch buttons simultaneously for five seconds. This mode allows you to troubleshoot any issues with your Whirlpool refrigerator quickly and easily.

Step-by-Step Guide to Accessing the Diagnostic Mode:

If you’re experiencing issues with your Whirlpool refrigerator and need to troubleshoot and diagnose the problem, accessing the Diagnostic Mode can be incredibly helpful. This mode allows you to view error codes and perform tests to identify the source of the issue.

Here’s a step-by-step guide to accessing the diagnostic mode:

Combination of Buttons to Enter the Diagnostic Mode:

To enter the diagnostic mode on your Whirlpool refrigerator, you’ll need to press a specific combination of buttons. Here’s how to do it:

Press and hold the “Temperature Up” button.

While holding the “Temperature Up” button, press and release the “Power” button.
Continue holding the “Temperature Up” button until the Control Panel’s LED lights up and the freezer temperature display shows “0.”
Once the display shows “0,” release the “Temperature Up” button.

Explanation of the Combination of Buttons:

Pressing and holding the “Temperature Up” button is the first step in entering the diagnostic mode. This button is typically located on the refrigerator’s control panel.
While holding the “Temperature Up” button, pressing and releasing the “Power” button initiates the Diagnostic Mode sequence.
Continuing to hold the “Temperature Up” button until the Control Panel’s LED lights up and the freezer temperature display shows “0” confirms successful entry into the Diagnostic Mode.

Releasing the “Temperature Up” button once the display shows “0” finalizes the process and allows you to navigate through the Diagnostic Mode menu.

Accessing the Diagnostic Mode can provide valuable information to help troubleshoot and resolve issues with your Whirlpool refrigerator. Remember to consult your refrigerator’s manual for specific instructions and to perform any necessary tests or diagnostics under the guidance of a professional if needed.

Interpreting Diagnostic Mode Codes (Seo-Friendly)

Interpreting diagnostic mode codes on a Whirlpool refrigerator is made easy with step-by-step instructions and videos on YouTube. Enter diagnostic mode by pressing and holding the temperature control and door switch buttons simultaneously for five seconds. From there, you can troubleshoot and identify any issues with your refrigerator.

Decoding the error codes displayed in the diagnostic mode:

Error codes in the Whirlpool refrigerator’s diagnostic mode serve as indicators of potential issues with the appliance. These codes are designed to help users troubleshoot and pinpoint the source of the problem.
To interpret the error codes, simply follow these steps:
Enter the diagnostic mode by pressing a specific combination of buttons on the control panel (refer to the user manual for instructions).

Once in diagnostic mode, the refrigerator will display a specific code on the panel.
Cross-reference the displayed code with the list of error codes provided in the user manual or online Whirlpool resources.

Common Error Codes and Their Meanings:

E1: This code indicates a malfunction in the refrigerator’s temperature sensor. It may require replacement or recalibration.

E2: The E2 code signifies a problem with the evaporator fan motor. It could be a wiring issue or a faulty motor that needs replacement.
E3: An E3 error code suggests a failure in the defrost thermostat. It will need inspection and possible replacement.
E4: This code points to a malfunction in the freezer temperature sensor. It might require recalibration or replacement.

E5: An E5 error code indicates an issue with the ice maker. It may be a faulty water valve or a sensor malfunction.
E6: The E6 code signifies a problem with the icemaker fan motor. It may require replacement or repair.

Troubleshooting Based on Specific Error Codes:

E1 code troubleshooting:

Check the temperature sensor’s wiring connection and ensure it is secure.
If the wiring is intact, consider replacing the temperature sensor.
E2 code troubleshooting:

Inspect the evaporator fan motor’s wiring for any loose or damaged connections.
If the wiring is in good condition, the motor may need replacement.
E3 code troubleshooting:

Check the defrost thermostat for any signs of damage or malfunction.
If necessary, replace the defrost thermostat to resolve the issue.
E4 code troubleshooting:

Verify the wiring connection of the freezer temperature sensor.
If the wiring is secure, recalibrate or replace the sensor.
E5 code troubleshooting:

Inspect the water valve for any issues or blockages.
If the water valve is functioning correctly, consider checking and replacing the ice maker sensor.
E6 code troubleshooting:

Examine the wiring connections of the icemaker fan motor.
If the connections are secure, the fan motor may need to be replaced.

Remember, these are just some of the common error codes you may encounter in the Whirlpool refrigerator’s diagnostic mode. Always refer to the user manual or seek professional assistance if unsure or unable to resolve the issue.

Diagnostic Mode Tests For Whirlpool Refrigerators

If you’re looking for diagnostic mode tests for Whirlpool refrigerators, you can activate the diagnostic mode by pressing and holding the temperature control and door switch buttons simultaneously for five seconds. This mode allows you to troubleshoot and diagnose any issues with your refrigerator.

Understanding the Different Tests Available in the Diagnostic Mode:

To effectively troubleshoot any issues with your Whirlpool refrigerator, it’s important to understand the different tests available in the diagnostic mode. This mode allows you to perform various tests and access valuable information about the functioning of your refrigerator.

Here are the key tests you can perform:

Cooling Diagnostics: This test helps you check the cooling functionality of your refrigerator. It lets you monitor the temperature readings and ensure that your refrigerator is maintaining the desired temperature.
Service Test Modes: Whirlpool refrigerators have different service test modes that allow you to perform specific tests for checking various components and functionalities. These modes help you identify any potential issues and ensure that all components are working as they should. Some common service test modes include:
Forced Defrost Mode: This mode initiates a forced defrost cycle, helping you troubleshoot any problems related to the defrosting system of your refrigerator.

Ice Maker Diagnostics: This mode allows you to test the ice maker’s functionality, ensuring that it is producing ice as expected.
Stored Error Codes: When your Whirlpool refrigerator encounters any issues, it stores error codes that can help you diagnose the problem. Accessing the Diagnostic Mode allows you to retrieve these error codes and understand the exact nature of the problem.

How to Perform Cooling Diagnostics to Check Refrigerator Functioning:

Performing cooling diagnostics is crucial for ensuring that your Whirlpool refrigerator is functioning properly. Here’s a step-by-step guide to help you perform cooling diagnostics:

Access Diagnostic Mode: Press and hold the ‘Temperature Down’ button on the control panel for 3 seconds. Release the button when the diagnostic mode is activated.
Navigate to Cooling Diagnostics. Use the up and down arrows to navigate through the different test options until you reach the Cooling Diagnostics test.
Start the test. Press the ‘Start’ button to begin the cooling diagnostics test. The test will display the current temperature readings of different compartments, such as the freezer and refrigerator.

Monitor the Temperature: Observe the temperature readings displayed during the test. Ensure that the freezer and refrigerator compartments are maintaining the desired temperature range.
Complete the Test: Once you have finished monitoring the temperature, press the ‘Stop’ button to end the cooling diagnostics test.

By performing cooling diagnostics regularly, you can identify any cooling issues early on and take the necessary steps to address them, ensuring the optimal performance of your Whirlpool refrigerator.

Service Test Modes for Checking Various Components and Functionalities:

Whirlpool refrigerators offer service test modes that allow you to check the different components and functionalities of your appliance. These test modes help in diagnosing any potential issues and ensuring that your refrigerator is running smoothly. Here are some common service test modes you can use:

Forced Defrost Mode: This mode is used to initiate a forced defrost cycle, helping you troubleshoot any issues related to the defrosting system of your refrigerator.
Ice Maker Diagnostics: With this test mode, you can check the functioning of your ice maker. It allows you to test various aspects, such as ice production and dispensing.

Control Modes: Whirlpool refrigerators have different control modes that allow you to activate specific functionalities or put your appliance into a demonstration or showroom mode. These modes help you understand and control the different operations of your refrigerator.

By using the service test modes, you can ensure that all components are working correctly and address any issues promptly. Regularly performing these tests can help you maintain the optimal functioning of your Whirlpool refrigerator and extend its lifespan.

Clearing Error Codes And Resetting The Whirlpool Refrigerator

To clear error codes and reset a Whirlpool refrigerator, you can enter diagnostic mode by pressing and holding the temperature control and door switch buttons simultaneously for five seconds. This mode allows you to troubleshoot and read error codes for better refrigerator performance.

Resetting the refrigerator to clear error codes and restore normal operation:

Is your Whirlpool refrigerator displaying an error code? Don’t panic! In this section, we will guide you through the process of clearing error codes and resetting your refrigerator to restore normal operation. Follow the steps below to get your refrigerator back up and running in no time:

First, locate the control panel on your Whirlpool refrigerator. The control panel is usually located on the front of the refrigerator, near the top.
Press and hold the “Reset” button on the control panel for a few seconds. This will clear any error codes that may be causing issues with your refrigerator.

Once you have released the “Reset” button, wait for a few minutes to allow the refrigerator to reset itself.
After the reset process is complete, check if the error code has disappeared. If the error code is no longer displayed, your refrigerator should now be functioning normally.
If the error code persists, you may need to perform a hard reset on your Whirlpool refrigerator.

Steps to Perform a Hard Reset on the Whirlpool Refrigerator:

Performing a hard reset on your Whirlpool refrigerator can help resolve more complex issues and restore the appliance to its default settings. Here’s how you can do it:

Unplug your Whirlpool refrigerator from the power source. This will ensure complete power disconnection.
Leave the refrigerator unplugged for at least 5 minutes. This will allow any residual electricity to drain from the system.

While the refrigerator is still unplugged, press and hold the “Power” button for 10-15 seconds. This will discharge any static electricity and reset the refrigerator’s internal components.
After the 5-minute waiting period, plug the refrigerator back into the power source.
Wait for the refrigerator to power back on and check if the error code has been cleared.

Performing a hard reset should clear the error code and restore your refrigerator to its normal operation. If the error code persists or if you encounter any other issues with your refrigerator, it is recommended to contact Whirlpool customer support or a professional technician for further assistance.

Resetting the Ice Maker for Better Performance:

If you’re experiencing issues with your Whirlpool refrigerator’s ice maker, such as slow ice production or ice cubes not dispensing properly, resetting the ice maker might help improve its performance. Follow these steps to reset the ice maker:

Locate the ice maker on your Whirlpool refrigerator. The ice maker is usually located inside the freezer compartment.

Look for the power switch or control arm on the ice maker. The location may vary depending on the model of your refrigerator.
Turn off the power switch or lift the control arm to the up position. This will shut off the ice maker and stop it from producing ice.
Leave the ice maker off for at least 1 minute.

After 1 minute, turn on the power switch or lower the control arm back down to its original position.
Wait for the ice maker to cycle and start producing ice again.

By resetting the ice maker, you are giving it a fresh start and allowing it to recalibrate. This can help improve the performance and functionality of your Whirlpool refrigerator’s ice maker.

Remember, if you continue to experience issues with your Whirlpool refrigerator or if the error codes persist, it is always recommended to seek professional assistance from Whirlpool customer support or a certified technician.

Troubleshooting Common Issues Using The Diagnostic Mode

Troubleshooting common issues with your Whirlpool refrigerator is made easier using the diagnostic mode. Enter this mode by pressing and holding the temperature control and door switch buttons simultaneously for five seconds, allowing you to identify and address any problems with your appliance.

Resolving Cooling Issues With The Help Of The Diagnostic Mode:

The Whirlpool Refrigerator Diagnostic Mode is an invaluable tool for troubleshooting and resolving cooling issues. By accessing the Diagnostic Mode, you can gather important information about the refrigerator’s operation and identify any potential problems. Here’s how you can use the Diagnostic Mode to troubleshoot cooling issues:

Enter Diagnostic Mode: To enter the Diagnostic Mode, locate the Diagnostic Mode button, usually located on the control panel, and press and hold it for a few seconds until the Diagnostic Mode is activated.
Temperature Sensor Test: Within the Diagnostic Mode, you can perform a temperature sensor test to check if the refrigerator is maintaining the correct temperature. Follow the instructions on the screen to initiate the test and monitor the temperature reading. If the sensor readings are outside the normal range, you may need to replace the sensor.
Defrost Test: In the Diagnostic Mode, you can also run a defrost test to ensure that the defrosting system is functioning properly. The test will activate the defrost heater and measure its performance. If the defrost heater doesn’t activate or fails the test, it may need to be replaced.

Damper Control Test: The damper control regulates the flow of cold air from the freezer to the refrigerator compartment. By running the damper control test in the Diagnostic Mode, you can check if the damper is opening and closing correctly. If the damper is faulty, it may need to be repaired or replaced.
Fan Motor Test: The fan motor plays a crucial role in circulating air throughout the refrigerator. In the Diagnostic Mode, you can test the fan motor to ensure that it’s running smoothly. If the fan motor is not operational or making unusual noises, it may need to be replaced.

By following these steps and utilizing the Diagnostic Mode, you can efficiently troubleshoot cooling issues with your Whirlpool refrigerator and take the necessary steps to resolve them. It’s important to note that if you’re unsure about performing any of these tests or if the issue persists, it’s recommended to seek professional assistance.

Troubleshooting Ice-Maker Problems Through the Diagnostic Mode:

The Whirlpool Refrigerator Diagnostic Mode is not only helpful for resolving cooling issues but can also assist in troubleshooting ice-maker problems. By accessing the Diagnostic Mode, you can diagnose issues with the ice maker and potentially fix them without the need for costly repairs or replacements. Here’s how you can use the Diagnostic Mode to troubleshoot ice-maker problems:
Enter Diagnostic Mode: To enter the Diagnostic Mode, locate the Diagnostic Mode button, usually on the control panel, and press and hold it for a few seconds until the Diagnostic Mode is activated.
Ice Maker Test: Within the Diagnostic Mode, you can perform an ice maker test, which will initiate a diagnostic cycle for the ice maker. This test will check different components, such as the water inlet valve, ice mold heater, and motor. Follow the on-screen instructions to run the test and observe the ice maker’s operation.

Harvest Test: The harvest test checks the ice maker’s ability to release the ice from the mold and fill it with new water. If the ice maker fails to release the ice or fill it with water, it could indicate a problem with the motor or water inlet valve. In such cases, these components may need to be inspected or replaced.
Motor and Heater Test: The Diagnostic Mode also allows you to run separate tests for the ice maker motor and heater. These tests will help identify any motor or heating issues that may be preventing the ice maker from functioning correctly. If either component fails the test, it’s advisable to replace it.
Sensor Tests: Some Whirlpool refrigerator models have sensors that monitor the ice maker’s operation. In the Diagnostic Mode, you can run sensor tests to ensure that these sensors are working correctly. If any of the sensors fail the test, they may need to be recalibrated or replaced.

By utilizing the ice-maker troubleshooting tests available in the Diagnostic Mode, you can diagnose and resolve problems with your Whirlpool refrigerator’s ice maker. However, if the issue persists or you’re unsure about performing the tests, it’s recommended to consult a professional technician for further assistance.

Fixing Other Common Refrigerator Issues Using the Diagnostic Mode:

The Whirlpool Refrigerator Diagnostic Mode is a valuable tool for troubleshooting a wide range of common refrigerator issues. In addition to cooling and ice-maker problems, the diagnostic mode can help identify and resolve other issues that may arise. Here are some common refrigerator problems that can be fixed using the diagnostic mode:
Door Switch Test: The Diagnostic Mode allows you to test the door switch, which is responsible for turning off the refrigerator’s interior light when the door is closed. If the door switch fails the test, it may need to be replaced.

Evaporator Fan Motor Test: The evaporator fan motor is responsible for circulating air over the evaporator coils to cool the refrigerator. Using the Diagnostic Mode, you can run a test to check if the fan motor is functioning correctly. If the fan motor is not operational or making unusual noises, it may need to be replaced.
Control Board Test: The control board is the brain of the refrigerator, responsible for regulating various functions. By running a control board test in diagnostic mode, you can determine if the control board is functioning properly. If the control board fails the test, it may need to be replaced to resolve the issue.
Display and Keypad Test: If you’re experiencing issues with the refrigerator’s display or keypad, the Diagnostic Mode allows you to perform a test to check its functionality. This test can help identify if there are any issues with the display or keypad that require attention or replacement.

Error Code Analysis: The Diagnostic Mode provides access to any stored error codes in the refrigerator’s memory. These error codes can give you valuable information about the specific issue that the refrigerator is experiencing. By analyzing the error codes, you can gain insight into the problem and take the necessary actions to fix it.

By utilizing the Diagnostic Mode to troubleshoot and diagnose other common refrigerator issues, you can efficiently identify the problem and take the appropriate steps to resolve it. It’s important to note that if you’re unsure about performing any of these tests or if the issue persists, it’s recommended to seek professional assistance.

Tips And Precautions For Using The Whirlpool Refrigerator Diagnostic Mode

Discover the essential tips and precautions for using the Whirlpool Refrigerator Diagnostic Mode. Learn how to activate this mode and troubleshoot your refrigerator efficiently. Master the diagnostic codes and system entry to ensure optimal performance of your appliance.

The Whirlpool Refrigerator Diagnostic Mode is a powerful tool that can help you troubleshoot and diagnose issues with your appliance. However, it’s important to keep a few things in mind to ensure that you use the diagnostic mode safely and effectively.

Here are some tips and precautions to follow for optimal results:

Important Things to Keep in Mind While Using the Diagnostic Mode:

Familiarize yourself with the user manual: Before diving into the diagnostic mode, make sure to read the user manual thoroughly. It will provide you with detailed instructions on how to access the diagnostic mode and interpret the error codes.

Take safety precautions: When working with the Diagnostic Mode, always unplug the refrigerator to avoid any electrical shock. Additionally, handle the appliance with care to prevent injuries or accidental damage.
Use the diagnostic mode for troubleshooting purposes only. The Diagnostic Mode is designed to help you identify and troubleshoot issues with your refrigerator. It’s not meant for regular operation or making any changes to the settings.
Record error codes and observations. During diagnostic testing, make sure to note down any error codes displayed on the screen. Also, observe and document any unusual behavior or symptoms exhibited by your refrigerator. This information will be helpful when seeking professional assistance or discussing the problem with customer support.

Precautions to Ensure the Safe Operation of the Refrigerator During Diagnostic Testing:

Avoid touching any internal components: While in the Diagnostic Mode, refrain from touching any internal parts of the refrigerator. This can disrupt the testing process and potentially cause harm to you or the appliance.
Do not force any buttons or switches. Use gentle and precise actions when navigating through the diagnostic mode. Forcing buttons or switches can lead to malfunctions or unintended consequences.
Keep an eye on the temperature. During diagnostic testing, ensure that the temperature inside the refrigerator remains within the safe range. If you notice any drastic fluctuations, stop the testing and contact a professional technician for assistance.

Troubleshooting Dos and Don’ts for Optimal Results:

Follow the step-by-step instructions: When using the diagnostic mode, carefully follow the instructions provided in the user manual. Skipping steps or jumping ahead can lead to inaccurate results and further complications.
Don’t make any unauthorized changes. Avoid altering any settings or parameters while in the diagnostic mode unless instructed to do so by a professional technician. Making unauthorized changes can worsen the problem or even void the warranty.
Do consult professionals if needed. If you’re unsure about the error codes or unable to fix the issue despite troubleshooting efforts in the Diagnostic Mode, don’t hesitate to seek assistance from Whirlpool customer support or a qualified appliance technician.

By keeping these tips and precautions in mind while using the Whirlpool Refrigerator Diagnostic Mode, you can effectively diagnose and resolve issues with your refrigerator, ensuring its safe and optimal performance. Remember to always prioritize safety and consult professionals when in doubt.

Frequently Asked Questions

How Do I Put My Whirlpool Refrigerator in Service Mode?

To put your Whirlpool refrigerator in service mode, press and hold the temperature control button and the door switch button simultaneously for five seconds.

How to Do a Hard Reset on a Whirlpool Refrigerator

To do a hard reset on a Whirlpool refrigerator, simultaneously press and hold the temperature control button and door switch button for five seconds. This will enter diagnostic mode.

How Do I Reset My Whirlpool Refrigerator Ice Maker?

To reset your Whirlpool refrigerator ice maker, follow these steps: 1. Press and hold the temperature control button. 2. Simultaneously, press and hold the door switch button for five seconds. 3. This will enter the refrigerator into diagnostic mode. 4. Release both buttons once you see the diagnostic mode screen. 5. Now, your Whirlpool refrigerator ice maker has been reset.

How Do I Get My Whirlpool Refrigerator Out Of Demo Mode?

To remove your Whirlpool refrigerator from demo mode, press and hold the temperature control button and the door switch button together for five seconds.

How Do I Activate The Diagnostic Mode On My Whirlpool Refrigerator?

To activate the diagnostic mode on your Whirlpool refrigerator, press and hold the temperature control button and the door switch button simultaneously for five seconds.

Conclusion

The diagnostic mode of your Whirlpool refrigerator is a powerful tool that can help you troubleshoot and resolve any issues you may be experiencing. By accessing this mode, you can gather valuable information about error codes, temperature settings, and more.

Whether it’s a faulty ice maker, a cooling problem, or simply the need to reset certain functions, the diagnostic mode can provide the answers you seek. With a few simple steps and the press of a button, you can enter this mode and navigate through its various features.

The ability to read error codes, activate forced defrost mode, or enter service test mode can save you time and money on potential repairs. So, the next time your Whirlpool refrigerator is acting up, don’t forget to utilize the diagnostic mode for a quick and accurate diagnosis.