A malfunctioning microwave display can be frustrating, especially when you rely on it for precise cooking times and settings. In this guide, we’ll walk you through the steps to troubleshoot and potentially resolve the issue of a Whirlpool microwave display not working. Before attempting any repairs, ensure your safety by unplugging the appliance from the power source.
Step 1: Check Power Supply
Begin by confirming that the microwave is properly plugged into a working electrical outlet. Sometimes, a loose or disconnected power cord can cause display issues.
Test the outlet by plugging in another appliance to ensure it’s functioning correctly. If the outlet isn’t working, you may need to reset the circuit breaker or replace a blown fuse.
Step 2: Inspect Control Lock
Many modern microwaves, including Whirlpool models, feature a control lock feature to prevent accidental use. Check if the control lock is activated. To disable it, press and hold the “Control Lock” button for 3-5 seconds or consult your microwave’s user manual for specific instructions.
Step 3: Reset the Microwave
Resetting the microwave can often resolve minor display issues. Unplug the microwave for at least one minute, then plug it back in. This action can reset the internal electronics, potentially resolving the problem.
Step 4: Check for Display Contrast Settings
Some microwaves have adjustable display contrast settings. If the display is too dim, it may appear as if it’s not working. Refer to your microwave’s user manual to learn how to adjust the display contrast.
Step 5: Test for a Bad Display Panel
If none of the above steps resolve the issue, it’s possible that the microwave’s display panel itself is faulty. To test this, press other microwave buttons that you’re familiar with. If the microwave still operates even though the display is not visible, it’s likely a display panel problem.
Step 6: Inspect the Control Board
The control board is the brain of the microwave, responsible for managing its functions, including the display. A malfunctioning control board can result in a non-working display. If you’re comfortable with electronics, you can inspect the control board for any visible damage, loose connections, or burnt components. If you find any issues, consult a technician for repair or replacement.
Step 7: Contact Whirlpool Customer Support
If the issue persists and you’re unable to diagnose or fix it on your own, it’s advisable to contact Whirlpool’s customer support or schedule a service appointment with a certified technician. Explain the problem in detail, and they can guide you through additional troubleshooting steps or arrange for a professional repair.
Step 8: Check for Software Updates
In some cases, a software glitch could be causing the display issue. Check if there are any available software updates or firmware upgrades for your microwave model on the Whirlpool website. Updating the software might resolve the problem.
Step 9: Test with Different Cooking Functions
Try using different cooking functions (e.g., defrost, popcorn, timer) on your microwave. If you notice that the microwave is still heating food and performing other functions correctly despite the display not working, it further indicates a display panel issue rather than a malfunctioning microwave.
Step 10: Examine for Physical Damage
Inspect the microwave for any physical damage, especially around the display area. Cracked or damaged display screens can result in display issues. If you find physical damage, it’s essential to replace the damaged parts.
Step 11: Monitor for Error Codes
Some microwave models may display error codes when they encounter problems. If your microwave has a display but shows an error code, refer to the user manual for a list of error codes and their meanings. This information can help pinpoint the issue and guide you in resolving it.
Step 12: Consider Warranty and Repair Options
If your Whirlpool microwave is still under warranty, be sure to check the terms and conditions. Display issues may be covered, and you may be eligible for a free repair or replacement. Contact Whirlpool’s customer support to discuss warranty coverage.
Step 13: Professional Diagnosis and Repair
If you’re not comfortable or experienced in dealing with microwave repairs, it’s highly recommended to consult a professional technician. They have the expertise and equipment to diagnose and fix complex issues with your microwave’s electronics and display.
Common Causes
Cause
Description
Possible Solutions
Difficulty Level
Cost to Fix
Power Supply Issue
Microwave isn’t getting power
Check power outlet and cord
Easy
Low
Door Switch Problem
Door switch malfunction
Replace door switch
Moderate
Moderate
Control Board Failure
Faulty control board
Replace control board
Difficult
High
Display Panel Failure
Display screen malfunction
Replace display panel
Moderate
High
Wiring Connection Issue
Loose or damaged wiring
Inspect and repair connections
Moderate
Moderate
Magnetron Fault
Magnetron isn’t functioning
Replace the magnetron
Difficult
High
Faulty Fuse
Blown fuse in the microwave
Replace the fuse
Moderate
Low
Overheating
Microwave overheating
Clean vents and check fan
Moderate
Low
Software Glitch
Software malfunction
Reset or update microwave
Easy
Low
Sensor Problem
Sensor not working properly
Replace or recalibrate sensor
Moderate
Moderate
Troubleshooting Steps
Step
Description
Check Power Supply
Ensure the microwave is plugged in and the outlet has power.
Inspect Door Switches
Test the door switches to ensure they engage properly.
Examine Control Board
Inspect the control board for visible damage or burn marks.
Assess Display Panel
Check if the display panel is responsive or has any visible issues.
Review Wiring
Inspect the wiring for any loose or damaged connections.
Test the Magnetron
Verify if the magnetron is producing microwaves.
Check the Fuse
Test the fuse for continuity or replace if necessary.
Prevent Overheating
Ensure the microwave has proper ventilation and is clean.
Software Reset
Try resetting the microwave’s software settings.
Sensor Calibration
Calibrate or replace sensors if they are malfunctioning.
Tools Needed
Tool
Description
Screwdriver
Used for opening the microwave casing.
Multimeter
To test electrical components for continuity.
Replacement Parts
Control board, display panel, fuse, etc.
Wiring Repair Kit
In case of damaged wiring.
Software Updates
For resetting or updating microwave software.
Sensor Calibration Kit
If recalibrating or replacing sensors.
Expertise Required
Level of Expertise
Description
Novice
Basic knowledge of electrical safety and ability to follow instructions.
Intermediate
Familiarity with electrical components and basic microwave repair.
Advanced
Proficient in electronics, soldering, and microwave repair.
