Read the installation instructions for your new unit. Depending on how old your existing oven is you may need to run a fourth wire as a ground if you only have a 3 wire 220v line now. Look at the oven breaker in your panel. It may be 40A. Your new oven could call for a 50A line. Find these things out.

If you are OK with paying a standard 30% restocking fee if you encounter what you don’t know that you don’t know, do what you want and have a giant paperweight delivered to your house. Then pay separately to a disposal company to take the old one away after you pull it out.

How “old” are the old ovens? What size cabinet are they built into? What amperage circuit is providing for them? Age of the circuit? As in, is it a 3 wire circuit or 4 wire circuit? How strong are you? Can you handle 150-200 pounds? All the way from the kitchen to the garage? How do you plan to do that? What about damaging your floors? What type of help do you have?

I’ve personally dealt with doing this with the right appliance dolly, a floor jack, and leverage, plus extra muscles. It was not easy at all. Heavy awkward things can HURT YOU if you aren’t truly prepared and have the right equipment to deal with them. Plus, there is all of the cabinet work and electrical needs that most homeowners are not usually equipped to deal with.

Again, it depends on your knowledge and comfort level, of which we don’t know. But, you haven’t asked the right questions here, or made the right statements that would give me assurance that you can run a new 240 line and trim cabinets, or build a new platform and color match for a filler if there is a gap. Plus the heavy stuff bit.

Tell us us more about the situation and your skills.

OP seems to be asking whether he/she needs to have experts come to the store to approve the purchase and is not planning on doing the actual installation.

I apologize for my unclear original post because I meant only to ask if experts had to come to our home to ensure we ordered an oven that would fit our current wall space and also work with our homes electrical system, breaker panel, oven breaker, etc.

I don’t plan to install the oven myself. . Looking back at the post, I can see how I should have been clearer about that.

From the answers here, I believe that I don’t have the expertise to determine whether an oven will have compatible connections with what we have . I also can see that I can’t easily determine other important factors without removing the old oven ( which I won’t do myself) .

Part of my frustration came from answers I got from appliance stores...or the lack of them. For example, when I asked about ordering new ovens, , I was usually told that the price included “delivery and installation” . Some ovens even came with a “guaranteed fit” promise.

But at least one reputable appliance dealer informed me, but only in a second call, that we were required to disconnect the old oven before installation....and that the store installers wouldn’t disconnect the old oven.. And if we didn’t disconnect our current ovens ,they’d simply leave the new ones ....uninstalled.. And then they noted that if anyone BUT the store installers did the installation we’d “potentially void the warranty”.

Some ovens have to be hard wired while others can be plugged in.

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Can you contact the GC who remodeled your kitchen and ask him for his opinion.

I just finished a remodel and found that the "free installation" also didn't cover anything beyond plugging in the appliance. I became somewhat inured to having to write checks as being part of the process.

As a lay person if I were in your situation, I would research which ovens I was interested in based on whatever criteria you are using so you aren't operating in a vacuum. At that point, I would be more in a position to ask intelligent questions - in terms of whether my cabinet would be able to fit the cabinet and whether there were some special electrical requirements.

I have had friends who had wall ovens replaced and based on their experience, any modifications to the cabinet were fairly easily made by a carpenter - again once I got my choices down to the one or two I wanted, I would specifically check and compare.

In terms of electrical, I would do the same. Perhaps your GC would be able to tell you what kind of electrical work was done during your remodel. Again, if you have the electrical requirements for the specific models you are interested in, you could get an answer.

It is a good idea to have someone come in with the specs of the oven you are looking to buy and have them check measurements. I'm in sales and have talk to many installers, they all say about 1/3 of the time the reinforce the platform . 'Guaranteed fit" means the manufacturer will pay for CABINET MODIFICATIONS ! Thru a mail in offer which nice but it would be better to know that up front. I NEVER SEEN "free installation" on a wall oven, especially if cabinet mods are needed. They are heavy ! ALL WALL OVENS MUST BE HARD WIRED ! Manufacturer required. If the store installers WILL NOT uninstall existing wall oven, GO SOMEPLACE ELSE!!! That is ABSURD !

Wall ovens aren't always simple replacements, gotta echo everyone else here. The way these are phrased are somewhat misleading - with "30 inch wall ovens" being a standard width among most major manufacturers, it leads people to think they're all the same size, but this is not the case. Biggest difference is in height, which can be all over the place depending on what you're looking at.

Tjmwine is right, "guaranteed fit" just means manufacturers will cover cabinet mods up to a limit through a mail-in rebate. Some units come with fit "kits", but it's basically just a panel to cover the top or bottom of any gap, and it still doesn't necessarily mean it will be a fit for your space. As far as double ovens go, most nowadays are 50 amp, so you definitely need that electrical in place.

Most appliance installers are not certified trades (electrician's, plumbers, carpenters, HVAC). Install means just that, putting a new appliance in and connecting it. It doesn't mean they will modify your home or fixtures in any way, shape or form. There's a lot of liability that comes with that, and I don't know of any company that includes this as part of a standard installation. Depending on where you're located, they may not even be able to connect the oven electrical - I'm in Houston, and here city code requires a certified electrician to do so. Most installers here, while capable, will not do the wiring if there is any kind of permit pulled or inspection involved. It does seem unusual that they wouldn't uninstall the old unit, unless there's a similar code in place.

The line about voiding your warranty is likely BS though - the warranty is offered by the manufacturer, unless you've bought an additional third party warranty that under contract requires install is done by a specific party. Some manufacturers will incentivize using particular installers by extending the warranty, but so far as I know, they're not legally able to void it through a self install or using an unauthorized installer. They'll throw you to the wolves if that unauthorized installer breaks or damages the unit, but they can't void it if it gets installed to spec.

Update and the good news and also the potentially ( not sure) bad news.

a licensed , experienced and recommended electrician just removed the old wall oven and confirmed that the new one will meet electrical requirements and codes, has the right number of wires, can be easily hard wired, etc ,. The amp rating is 40 and our oven’s electrical and breakers can handle that. He removed the old oven.

The not so great news is is that the new oven that we want has an overall height of 52 inches. Our current oven’s cutout is 49 inches high . However, the electrician took measurements and believes we have to simply expand the top opening. There’s enough wall space to do that.

He hastened to inform us, though, that that he is not a carpenter and advised we consult one.

So we plan on having a carpenter out to evaluate things before installation. The appliance company installers can not make any modifications, do carpentry work , etc. Our experience, however, is that they will do modifications to the cutout for an additional price.

either a carpenter or a cabinet guy.