How to Install a Wall Oven in a Base Cabinet Easily

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Last Updated on June 3, 2021
Doug Stephen

A long-time contributor to SeriouslySmoked. Jim has had a lifelong relationship with the art of grilling, passed on from his father and grandfather to him.  

Doug is a hardcore barbeque enthusiast and connoisseur. While he spends most of his time on editing and research,
he sometimes moonlights as a product tester for particularly interesting things he comes across.

how to install a wall oven in a base cabinet

Most people don’t think of ovens as a DIY project, but if you’re comfortable handing electrical and gas connections, it’s easy to install a new oven on your own. If you’ve been eyeing a new wall oven, now is a great time to make purchase and do the setup. By following these easy steps, you can avoid the back strain caused by under-counter oven installations.

Wall ovens may or may not include warming drawers, microwaves, or convection ovens, so you’ll need to check your dimensions carefully. However, once the oven has arrived at your home and you’ve confirmed the fit, installation is simple. Here’s how to install a wall oven in a base cabinet.

1. Have a Second Person Handy

Learning how to install a wall oven in a base cabinet is a straightforward process, made even easier by paying attention to the manufacturer’s included instructions. However, you may need a second person on hand to help you move the old oven out and the new oven in.

Even if you don’t need help lifting it into place, another person can look on while you slide in the oven, ensuring you place it accurately. If you misjudge the placement, you could accidentally damage your cabinet, resulting in costly repairs.

2. Preparing For Installation

Whether the oven is gas or electric, you’ll need to turn off the electrical circuit first. Even if you think you’ve turned off the correct circuit, double-check by using a non-contact electrical tester at the back of the cabinet. If you’re replacing an existing oven, make sure the electricity is entirely off by trying to turn the oven back on after the circuit has flipped it off.

Remove the existing oven by taking off the doors first, either by sliding them up and off the hinges or unscrewing them, depending on the manufacturer’s instructions. Look for and remove any pieces of trim or screws that may be securing the oven in place as well. Slide out the oven enough to disconnect the electrical or gas connections at the back, using an electrical tester once again for safety before cutting the wires.

Measure the existing opening and compare it to your new oven’s dimensions. If there is less than ¼” clearance on each side of the new unit, widen the space using a reciprocating saw.

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3. Setting Up the Electronics

Uncover the junction box in the adjacent cabinet so you can clearly see what you’re connecting to. If you’re replacing an old oven, the new oven will likely work with the old hookups, but you will need to verify the voltage required. Some ovens run on 240 volts, while others switch between 120 and 240 and require a neutral.

For new installations, knock out the hole on the junction box cover and secure the wires in place with a wire clamp. Strip the last ¾” of coating of the oven’s wires and connect them to the junction box’s wires, making sure to match colors. The green wire on the back of the oven will connect to either a white or bare wire in the junction box.

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4. Gas Connections

Gas oven connections usually just use an AC plug for the onboard electronics and a gas valve to heat the oven. If you are trying to connect a gas oven to an existing electrical connection or vice versa, you may need to consult with a contractor to get a gas hookup close enough to the wall oven.

Place thread seal tape on the gas valve nipple, then connect the coupler from the back of the oven onto the nipple, making sure to tighten it. Turn on the gas valve and immediately check for leaks with a liquid leak detector. If gas is getting out of the connection, the detector will bubble up, and you should immediately turn off the gas valve and air out the room. However, if there are no leaks in the gas connections, you can plug in the AC connection.

5. Mounting the Oven

Before sliding the oven into place, verify the locations of the mounting screw holes. There should be 4 visible from the front that will only make sense to pre-drill after the oven is in place.

Carefully slide the oven fully into place and check the holes’ placement. Review the manufacturer’s directions to make sure you place any additional parts correctly. Pre-drill the required holes with a ⅛” screw bit unless otherwise instructed by the directions. Tighten the mounting screws into place, then snap the trim into place and check everything to make sure it is flush and tight.

Although you should read through the directions ahead of time to make sure the manufacturer doesn’t require otherwise, attaching the doors usually comes last since they can theoretically fall open while the oven is being moved into place. Once the rest of the oven is secured, slide or screw the door into place. Open and close it a few times to make sure everything is tight before getting ready to test the oven.

6. Testing for Safety

Turn the circuit breaker back on and turn on the oven for the first time, making sure to carefully walk through any prompts the oven gives you. Test the oven by turning it to a set temperature and confirming it with an oven-safe thermometer once it’s preheated.

Any interruptions in power or abnormally high or low temperatures are grounds for concern. If in any doubt about the oven, disconnect the breaker and shut off the gas before consulting with a professional or calling the oven’s customer service line for support. Even if you are confident in knowing how to install a wall oven in a base cabinet, there may be an underlying issue with the connections if your house is old.

Make sure to hold on to the manufacturer’s instructions, receipt, and warranty information. Also, consider purchasing extended protection on the warranty offered by the manufacturer, as standard warranties might not provide enough protection.

Doug Stephen

Doug Stephen

Becoming an Expert at DIY

Even if you don’t think of yourself as a DIY enthusiast, you can take the plunge into installing your own oven like a pro. This installation job can be done in an afternoon with some basic safety precautions and a second set of hands for lifting the oven safely. You can save money and give yourself the satisfaction of a job well done without even having to leave the house.