Craftsman 3/4 HP myQ Ultra-Quiet Smart Belt Drive 2-Light System Garage Door Opener with Wi-Fi® and Battery Backup
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Availability:
In Stock.
Arrives
Sunday, May 17
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Style: CMXB4230 Garage Door Opener
Features
- BATTERY BACKUP: Allows access to your garage even during power outages; battery included.
- ULTRA-QUIET OPERATION: A DC motor and premium belt drive deliver smooth, ultra-quiet performance, ideal for garages near living spaces.
- SMARTPHONE CONTROL: Integrated Wi-Fi lets you monitor and control your garage door using the CRAFTSMAN myQ App from anywhere, at any time.
- LIFT CAPACITY: 3/4 HP. For comparison purposes only; lift capacity similar to 3/4 horsepower AC motor. Lift power of DC motors is typically not measured in horsepower.
- LIGHTING: Illuminate your entire garage with the 2-light system, providing front and rear coverage for more complete garage visibility. Bulbs not included.
- LIMITED WARRANTY: Includes a 5 year warranty on both the motor and the belt drive.
- MULTI-FUNCTION WALL CONTROL: Open or close your garage and turn on the lights.
- TWO 1-BUTTON REMOTES: The included 1-button remotes give you fast, reliable control from the comfort of your vehicle. With a range of up to 1,500-ft, you can enter and exit your garage without waiting. Two included.
- ACCESSORY COMPATIBILITY: Comes pre-paired with included accessories. Most older accessories may not be compatible. Additional compatible accessories: myQ Video Keypad, myQ Smart Garage system, CMX363 (3-Button Remote), CMX348 (Keypad), CH125 (Wireless Wall Control), CHU48 (Universal Wireless Keypad), CHU62 (2-Button Remote), and CHU62W (2-Button Remote).
Description
This CRAFTSMAN® 3/4 HP Belt Drive Garage Door Opener Kit is built to impress. Ideal for attached garages, the steel-reinforced belt drive delivers smooth, quiet performance time after time. The opener’s strength is only matched by its technology. Engineered with battery backup, you can access your garage even during power outages. With integrated Wi-Fi® and smartphone control via the CRAFTSMAN® myQ® App, you’ll receive real-time alerts and be able to open or close your garage door from anywhere, at any time, right from the palm of your hand. The Multi-Function Wall Control operates the garage door opener and its lights independently. The two included 1-Button Remotes offer up to 1,500 feet of range, letting you enter or exit your garage without delay. A 2-light system provides full garage illumination (bulbs not included), and the unit comes with safety reversing sensors. Backed by a 5-year motor and belt warranty, this opener reflects Craftsman’s commitment to lasting performance.
Manufacturer: Craftsman
Part Number: CMXB4230
Item Weight: 31.1 pounds
Product Dimensions: 14.6 x 8.2 x 7.2 inches
Item model number: CMXB4230
Color: Red
Style: CMXB4230 Garage Door Opener
Item Package Quantity: 1
Included Components: Craftsman 3/4 HP Smart Belt Drive Garage Door Opener, 2 x 1 Button Remotes
Batteries Included?: Yes
Batteries Required?: Yes
Battery Cell Type: Lithium Metal
Date First Available: September 12, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, May 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: CMXEOCG472 Garage Door Opener
First I'll say, this is my second craftsman garage door opener that I've purchased, I bought one for my previous house, and our new house needed a new one so I'm glad I went with the same brand again. Assembly instructions are decently clear, assembly was easy and only required a few tools. Expect to spend between 2 and 5 hours for assembly and install start to finish, closer to 5 if you have an existing opener to remove. I had to move the mounting supports from the old opener and remove old wiring etc that added time to installation. It's much quieter than the old opener but not silent, which is to be expected. My only real complaint is the MyQ wifi setup was confusing, the app provided incorrect instructions (yes I chose the correct model in the app). The problem is the instructions don't tell you that the opener will beep and flash the setup light like it's supposed to, however, if you've not completed the initial setup safety test and adjustment of the door, AND complete a full open-close cycle, the opener won't actually enter wifi setup mode (even though it will beep and flash the lights like it is - it's a lie!). If you get an error message about "device not in provisioning mode", you'll need to unplug the opener, plug it back in and complete a full open-close cycle BEFORE following the instructions to put it into wifi setup mode. You'll need to do the open-close cycle anytime your opener experiences a power loss before it will reconnect to wifi (even if already setup previously). After I looked those instructions up on the chamberlain website, it linked and works perfectly. I like that it comes with two remotes and the PIN opener. Those along with the wifi ability really make this a top product and great for the price.
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Reviewed in the United States on November 7, 2022 by James Ferris
Style: CMXEOCG472 Garage Door Opener
Perfect item. Easy to install. All the functions are working perfectly.
Reviewed in the United States on April 5, 2026 by VCh
Style: CMXEOCG472 Garage Door Opener
Great item, good price
Reviewed in the United States on April 1, 2026 by Scott Kempthorne
Style: CMXEOCG472 Garage Door Opener
Many reviewers on here have commented correctly that the instructions are unclear in some parts, and they are absolutely correct about that. I will make some comments on things I bumped into and my fixes for them below. Overall this was my first install and I had to remove some early 90's era equipment so that slowed me down quite a bit, but I also did not (thankfully) have to replace the door, door tracks or springs. So, for starters, I advise everyone to go through the box carefully and unpack everything one piece at a time. I was not missing anything but many comments online are that parts have been missing. Next, if you are putting this together, put it together in the garage where you are mounting it and put it together unit under unit being replaced. IE - equipment lined up as it would be upon installation. I made the mistake of putting this in a mudroom to install and had it backwards, it is cumbersome to turn it around. Third, the chain tensioner is simply bizarre. The screws allegedly provided were not labelled (none of them are) nor labelled in the instructions as most others are. Also, there are two small screws in the holes where the tensioner is to be mounted, but there are many other holes around the chain sprocket that are empty. That is confusion and frankly, a stupid way to do this. At least the designers could have put the actual mounting screws in the holes (the small screws in the holes are inadequate to mount the tensioner. Next is mounting and tightening the chain. Advice - before tightening the chain, put in the master link and lock - it is impossible to put the link cover and lock hasp on when the chain has been fully tightened. Also be prepared to use 2 wrenches to do that (1/2" I think), you will need one to hold the inner nut and the other one to tighten the outer nut. I would advise everyone to get the inner nut pretty far in as you run out of room quickly with the outer nut and if that doesnt tighten it up adequately you will have to redo it. It is much easier if you can put this on a table to do rather than on the floor, btw. If you have an existing door, some of the equipment may be salvagable but I would not recommend using any of the mounting equipment from your old opener as these things need to be precise, and bowing up the rail with a tight chain could cause the mounting bracket to warp or even worse, fall. Just a word to the wise. The safety sensors MUST be mounted and wired before you can use the door and program it - this was a challenge for me because the door rails were pretty high, and the sensor brackets are not adjustable. I solved this by going to Lowes and having some 7 x 3/4" pieces of wood cut, then mounting the sensors on them. Worked like a charm, but, the screws to mount the brackets are SMALL so holding the sensors up while also holding the screw and drill took no small effort. If possible, pre-drill your holes before mounting the sensors unless you already have some on there. I do NOT recommend mounting them on the door rails because the vibration will shake them off or out of alignment. Mounting was not too bad, I was able to use the existing mount for the main drive unit without issue, and the rail was a perfect fit from the old rail, so thankfully that worked out. As an aside, as we had an older home we had a direct wired opener and I was not sure how to handle that with the unit, but fortunately the red and white wires from the old wall opener matched up with the red and white tension sockets in the motor unit, so I popped them in and it worked like a charm. If you do NOT have the sensors wired AND the wall mount wired, you will likely not be able to program the door. As others have said, and I agree, you must fully cycle through the programming BEFORE doing the wifi. If you have issues with the programming, I recommend you unplug and restart the unit. It may take a couple of gos before you get it, but it does work in the end. Extra tools I recommend you get - wire strippers (for the sensor wires), wire stapler and wire staples (4-6mm should do easily), extra screws for the tensioner (I think they are 8x1/1/4 but the page give them), 7/16 and 1/2 sockets, same size manual wrenches for tightening the chain, and of course some patience. With all my set backs this took about 6 hours but now that I know how to do it it should be closer to 4 (this includes removing and breaking down the old units too). Hope this helps!
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Reviewed in the United States on February 12, 2024 by deaconhound
Style: CMXEOCG472 Garage Door Opener
2014 model wasn’t working so we swapped out main unit. We were able to use old chain, bar and door sensors. Needed to use new wall mount, remotes and keypad older one didnt work as instructions said. Did learn that we needed to adjust the up and down door motion at main unit before wall mount and remotes would work. Remotes were already preprogrammed and keypad was easy to program by following instructions . Haven’t gotten the new remotes to work with our older craftsman’s openers, therefore we’re stuck with 2 openers per car.. My Q WiFi was easy to set up and worked great. Didn’t like that Amazon tries to setup Amazon key when setting My Q up. You have to go into Amazon account to delete it if you accidentally add it in setup. Great swap out for older model..
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Reviewed in the United States on June 3, 2024 by Jackie
Style: CMXEOCG472 Garage Door Opener
Works as it should. Opens and closes.
Reviewed in the United States on March 31, 2026 by Mimi
Style: CMXEOCG472 Garage Door Opener
Replaced older Craftsman opener with this one. Easy install using old track and chain. Much quieter than old system (which lasted about 20 years!)
Reviewed in the United States on March 28, 2026 by GMat
Style: CMXEOCG472 Garage Door Opener
I waited a few months of use before reviewing. I replaced it myself with their directions and quality has been wonderful. It is far more quiet that my 15 year old screw drive. Recommend!
Reviewed in the United States on March 2, 2026 by Matthew