How to Install an Over-the-Oven Microwave?
Installing an over-the-oven microwave involves careful preparation and precise mounting to ensure safe and effective operation; this guide breaks down the entire process. The key steps include measuring and marking, installing the mounting plate, and securing the microwave with the necessary hardware, finally testing to guarantee proper functionality.
Introduction to Over-the-Range Microwaves
Over-the-range (OTR) microwaves offer a space-saving solution for kitchens, combining the functionality of a microwave with a range hood. These appliances are designed to be installed above the stovetop, freeing up valuable counter space. However, proper installation is crucial for safe and efficient operation.
Benefits of Installing an Over-the-Oven Microwave
Choosing an OTR microwave presents several advantages:
- Space Saving: Clears counter space by mounting above the range.
- Integrated Ventilation: Functions as a range hood, removing smoke and odors.
- Convenience: Positioned at a comfortable height for easy access.
- Improved Kitchen Aesthetics: Creates a streamlined and modern look.
Preparation is Key
Before starting the installation, gather the necessary tools and materials:
- Safety Glasses: Essential for eye protection.
- Gloves: Protect hands during the installation process.
- Drill with Drill Bits: For creating pilot holes and securing screws.
- Screwdriver Set: Including Phillips and flathead screwdrivers.
- Stud Finder: To locate wall studs for secure mounting.
- Level: Ensure the microwave is installed straight.
- Measuring Tape: Precise measurements are crucial.
- Pencil: For marking locations.
- Wrench: For tightening bolts if necessary.
- Microwave Mounting Hardware: Included with the microwave.
- Electrical Wire Stripper/Crimper: For electrical connections (if wiring is needed).
- Voltage Tester: To confirm the electrical circuit is off.
Step-by-Step Installation Process
Installing an OTR microwave can be achieved by following these steps:
- Disconnect Power: Turn off the circuit breaker that supplies power to the existing range hood or outlet. Use a voltage tester to confirm the power is off.
- Remove Old Appliance: If replacing an existing range hood, carefully remove it. Disconnect any electrical wiring and remove screws or bolts holding it in place.
- Locate Wall Studs: Use a stud finder to locate wall studs behind the microwave installation area. Mark the stud locations.
- Install Mounting Plate: Attach the mounting plate to the wall using appropriate screws, aligning it with the marked stud locations. Ensure the plate is level.
- Prepare the Cabinet Above: Drill pilot holes in the bottom of the cabinet above the range for the microwave’s top mounting screws. Use the template provided with the microwave for accurate placement.
- Lift and Align the Microwave: Carefully lift the microwave into position, aligning it with the mounting plate and the pilot holes in the cabinet.
- Secure the Microwave: Secure the microwave to the mounting plate using the screws provided. Tighten the screws firmly, ensuring the microwave is stable. Also, secure the microwave to the cabinet through the holes drilled earlier.
- Connect Electrical Wiring: Connect the microwave’s electrical wiring to the house wiring, matching the wire colors (black to black, white to white, green or bare copper to ground). If you are not comfortable with electrical work, consult a qualified electrician.
- Install Grease Filters: Install the grease filters in the bottom of the microwave.
- Test the Microwave: Restore power to the circuit breaker and test the microwave to ensure it is functioning properly.
Common Mistakes to Avoid
Avoid these common installation errors:
- Incorrect Measurements: Accurate measurements are essential for proper alignment and fit.
- Ignoring Stud Locations: Failing to anchor the mounting plate to wall studs can result in an unstable installation.
- Improper Wiring: Incorrect wiring can damage the microwave or create a fire hazard.
- Over-Tightening Screws: Over-tightening screws can strip the threads or damage the cabinet.
- Forgetting to Test: Always test the microwave after installation to ensure it is working correctly.
Ventilation Considerations
Proper ventilation is crucial when installing an OTR microwave. The microwave typically vents either through the wall, through the roof, or recirculates air back into the kitchen. Ensure the venting system is properly connected and functioning. If you need to change the venting direction, consult the microwave’s installation manual. Some units come with vent redirection accessories and require specific configurations.
Dealing with Awkward Spaces
Sometimes, kitchens present unique challenges. If you’re dealing with an awkward space or unusual cabinet configuration, consider these options:
- Shimming: Use shims to level the mounting plate if the wall is uneven.
- Custom Brackets: Fabricate or purchase custom brackets to accommodate unusual cabinet configurations.
- Professional Installation: If you encounter significant difficulties, consider hiring a professional installer.
Safety First: Double-Check Your Work
After completing the installation, thoroughly inspect your work. Ensure all screws are tightened, the electrical connections are secure, and the microwave is stable. Double-check the ventilation system to ensure it’s functioning correctly. Your safety and the longevity of your microwave depend on a properly executed installation.
Frequently Asked Questions (FAQs)
What is the ideal height for installing an over-the-range microwave?
The recommended height is typically between 24 and 30 inches from the cooktop to the bottom of the microwave. This provides adequate clearance for cooking and allows for easy access. Check your local building codes and the microwave’s installation manual for specific requirements.
Do I need a special electrical outlet for an over-the-range microwave?
Most OTR microwaves require a standard 120V outlet. However, check the microwave’s specifications to confirm its power requirements. Ensure the outlet is properly grounded and wired according to electrical codes.
Can I install an over-the-range microwave if I don’t have a vent?
Yes, many OTR microwaves can be configured to recirculate air. These models use a charcoal filter to remove odors and grease before venting the air back into the kitchen. While less effective than venting to the outside, it’s a viable option when external venting isn’t possible.
What if my wall studs don’t align with the mounting plate holes?
If wall studs don’t align, you can install horizontal bracing between the studs. Secure a piece of wood between the studs to provide a solid mounting surface. Alternatively, use heavy-duty drywall anchors designed to support the weight of the microwave.
How do I know if the microwave is level?
Use a level to check the mounting plate and the microwave itself after installation. Adjust as needed using shims to ensure the microwave is perfectly level. A level microwave ensures even cooking and prevents spills.
What if I can’t find the stud locations in my wall?
Use a stud finder to locate the edges of the studs. If a stud finder isn’t working effectively, try tapping lightly on the wall. A solid sound usually indicates a stud location. Alternatively, you can drill small pilot holes to probe for studs.
What type of screws should I use to install the mounting plate?
Use lag screws or wood screws that are long enough to penetrate the wall studs securely. The screws should be at least 2 inches long. Ensure the screws are appropriate for the type of wall material (e.g., drywall, plaster).
How much does it cost to have an over-the-range microwave professionally installed?
Professional installation costs vary depending on your location and the complexity of the job. Expect to pay between $100 and $300 for professional installation.
What is the proper way to disconnect the old range hood’s electrical wiring?
Always turn off the circuit breaker first! Then, carefully disconnect the wires, using wire connectors to join the wires correctly. Take pictures of the wiring before disconnecting it for reference during the new microwave’s installation.
Can I use an over-the-range microwave above a gas cooktop?
Yes, OTR microwaves are designed for use above both gas and electric cooktops. However, follow the manufacturer’s recommended clearance guidelines to ensure adequate ventilation and prevent damage to the microwave.
What if the cabinet above the microwave is too shallow?
If the cabinet is too shallow, you may need to use spacers to extend the mounting surface. Alternatively, consider replacing the cabinet with a deeper model. In some cases, you might need to use longer screws.
How do I clean the grease filters in my over-the-range microwave?
Most grease filters are dishwasher safe. However, check the microwave’s manual for specific cleaning instructions. Regularly cleaning the filters helps maintain proper ventilation and prevents grease buildup. You can also clean them by hand using hot, soapy water.