Whirlpool Microwave Outer Door Glass Replacement WP4452259

Got a cracked microwave door glass? Don’t worry, we’ve got you covered! Whether it’s just a small fracture or completely shattered, our step-by-step guide will show you how to replace the outer glass panel on your Whirlpool microwave effortlessly. And to make it even easier, check out the accompanying how-to video just below to save yourself a costly repair call.

Looking for the right part? Enter your appliance model number below to find the exact match and get your appliance running like new again!

Cracked microwave door glass? No worries, replacing the outer glass panel (part WP4452259) on your Whirlpool microwave is a pretty straightforward fix. Whether it’s just a hairline fracture or completely shattered, this replacement can have your appliance looking new and safe again. Grab a screwdriver and follow along. We’ll show you how to get it done without calling a repair tech.

Watch: How to Replace the Outer Microwave Door Glass

The information in this article may not apply to your specific appliance model. We recommend consulting your manufacturer’s documentation or contact us with any questions.

The Role of the Outer Door Glass

Before jumping into the repair, it’s important to understand what exactly that pane of glass on the outside of your microwave door actually does. Some may think it’s just for looks, but its roles extend beyond the aesthetic:

• Protects from interior heat – The metal and other components on the inside of the microwave door get extremely hot during cooking. The outer glass creates a protective barrier between your hands and those scalding hot parts.
• Allows viewing inside – While you don’t want to touch the interior, being able to see inside the microwave is crucial for monitoring your food. The clear glass enables this.
• Contributes to structure – The sturdy outer glass is partially load-bearing, keeping the overall door aligned and functioning smoothly.

The outer door glass does a whole lot more than just look pretty on the front of your microwave. When it becomes damaged, restoration is key for both safety and performance.

Gather the Right Tools

• Replacement Outer Door Glass -Use your model number to locate the correct part. This can be purchased from AppliancePartsPros.com
• Phillips Screwdriver 
• Flat Blade Screwdriver  

Safety precautions   

Safety should always be a priority when working on any appliance. Here are a few practical tips to help you stay safe:

• Turn off the power to the appliance by unplugging it or switching off the circuit breaker before starting any maintenance or repairs. This protects you from the risk of electric shock.
• Wear insulated gloves to shield your hands from sharp edges, pinching hazards, or debris.
• Work at a steady pace and take your time to avoid accidents or injuries.
• Make sure your workspace is well-lit so you can clearly see and access the parts you’re working on.
• Keep the area clear of clutter, and ensure children and pets stay out of the workspace.
• Never handle internal parts with wet hands. Check that both your hands and the work area are completely dry.
• Refer to your appliance’s user manual for any specific instructions or safety guidelines related to the part or repair.
• Handle parts gently to avoid damage to the appliance or potential injuries from applying too much force.
• Use safety glasses when dealing with chemicals, dust, or large debris to protect your eyes from harm.
• If the appliance was recently used, give it enough time to cool down before working on any heated components.
• Take photos or notes of wiring connections and terminals before disconnecting anything to make reassembly easier.
• Avoid touching exposed wires or terminals. If you must handle wires, use non-conductive tools or wear insulated gloves to minimize the risk of electrical shock.

Step 1 – Detach the Microwave Door

The first step is getting the damaged door removed from the main microwave body. Here is the safest process:

1. Fully open the microwave door. Locate the small rectangular plastic hinge stoppers on either side.
2. Take the flat blade screwdriver and gently pry up on each stopper until they release upward. This will allow the door to detach.
3. With both stoppers flipped up, carefully grasp the door by the sides (avoiding any hazardous broken glass).
4. Lift straight upward to fully remove the microwave door. Set it gently on a flat, padded surface.

With the door detached, you now have full access to replace the outer glass panel.

Step 2 – Remove the Interior Door Frame

The interior metal door frame holds the outer glass in place, attached by screws along the top and sides. Removing this interior frame is required to get the damaged glass off and replace it with the new one.

1. Loosen the two bottom retaining screws using the Phillips screwdriver. You can insert it through the vent holes, or for easier access, pop off the vent grill by removing the 4 corner screws.
2. With the bottom loosened up, move to the top of the door. Firmly grasp the handle for support.
3. Using the Phillips head, unscrew the two top screws from the interior metal frame.
4. Slowly pull the top of the frame outward while continuing to hold the handle steady. This interior assembly is spring-loaded so be cautious.
5. With the top freed, lay the door handle-side down on your work surface. The old glass should easily slide out, ready for the new panel.

Step 3 – Transfer Door Handle & Components

With the interior frame detached and the old glass removed, a few more components need to be transferred over before inserting the new replacement glass:

1. Use the Phillip screwdriver to remove the screws from the handle on both sides. This allows the handle and side brackets to come off.
2. Take note of the handle and bracket orientation for accurate re-installation. Also, set the screws aside in a safe place.
3. Slide off the old outer glass panel and discard it carefully to avoid any broken shards. Thoroughly clean the interior frame in preparation for the new glass.
4. Remove any adhesive remnants from the old glass and wipe down the door interior with isopropyl alcohol to promote adherence.

Step 4 – Install the New Outer Door Glass

You’re now ready for the satisfying moment of installing the new replacement outer door glass. Just follow these simple steps:

1. Peel off the protective film from both sides of the new glass panel. Discard the film.
2. Check the fit by gently placing the glass into the interior door frame. It should sit flush within the rails.
3. Once aligned, reattach the handle and side brackets using the original screws. Tighten everything down snugly.
4. Carefully flip the door right-side up, keeping a firm grip on the handle. The new glass should now be securely installed and ready for years of service.

Step 5 – Rehang the Microwave Door

You’re in the home stretch! Just a few more steps to get the renewed door re-mounted onto the microwave:

1. Line up the hinges on the door with their inserts on the microwave frame.
2. While holding the door in place, flip down the hinge stoppers once again to lock everything together.
3. Reinstall the vent grill if you removed it using the 4-corner Phillips screws.
4. Restore power at the circuit breaker.
5. Test thoroughly by heating up a cup of water and checking for any leakage, odd sounds, or issues with the new glass staying firmly in place.

That’s it – you’ve successfully completed this repair and restored your microwave door to safe working order!

Where To Find Us 

If you need any replacement parts for your appliances, you can enter your model number at AppliancePartsPros.com to locate and order them quickly. Most orders arrive in just two business days, and we have tons of great information in our repair help section and YouTube videos to help you troubleshoot.

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