This little guy is UL rated at 1A max at 30V DC! It appears that Linear has chosen to wait 60 seconds or so. BTW, there’s Vcc on the print board, which can provide +3V power to the remote. Everything existing still works as expected. How could it not work? Most LiftMaster devices are pretty straightforward. My garage is a lift master 7675. mcavoya - this is brilliant! I can’t find my documentation, so I don’t know exactly which terminals they are. Yet every now and then, the manufacturer decides to throw us a curveball. . Apparently there is a law which requires this type of device to wait at least 30 seconds between operations. The transistor then switches the test point “SS” to ground. Now for the full disclosure part. No beeping or anything until the hour is up. I first thought it was that and waited a full day before trying again but still no dice. The position sensor works when I manually move the door. So I took it on step further. Hope this thread helps many others! Then I read a few threads where the GD00Z’s wires were connected to the pushbutton of a wireless remote, which then operates the door. Thanks for sharing your modification! Did you ever figure out he one hour delay? Consult the myQ compatibility chart and make your garage door opener smarter. Actually I take it back, I don’t know if i did something but it seems to work once per hour. Makes my day. Learn how to set up LiftMaster myQ-enabled Wi-Fi garage door openers. . My garage is detached and about 30 feet from my next closest z-wave device. I was super curious to understand why the GD00Z-4 wouldn’t work with my opener. It appears that Linear has chosen to wait 60 seconds or so. Tap Yes if you have a blinking blue LED light. and My GD00Z-4 also works as expected. TL;DR – Shorting test point “SS” to ground seems to have let my GD00Z-4 work with my LiftMaster. Ok so I need help, I have been reading and reading all of these posts. The “COM” test point is circuit ground. I only use my wall button as a button. Thanks. . Obviously, I’ve voided my warranty (for sure on the GD00Z-4, possibly on the door opener?). There is just no way the GD00Z-4 can’t operate my opener. Another variation is connecting the wires to the coil of an external relay, which was then used to operate the door. To be clear, are we saying that the fancy motion detector garage door push button’s wires can be shorted to open the garage door? I have a Craftsman garage door opener with the “smart” wall switch (motion sensor, temperature, etc.) So I looked at test point “SS” with my 'scope. I could have tried to remove the “noise” by adding a bigger filter cap, or forcing the transistor into the “on” state by lifting the base resistor and applying a fixed voltage to it. The rectified voltage is filtered by a small cap and fed to the base of a transistor. Following your instructions, I opened the GD00Z-4 up and soldered a wire to the points you specified above. I suggest separating the Linear device and the wall button to isolate the problem. I am curious – do you have the MyQ option? And if you have an ohmmeter, connect it to the Linear’s output. We’ve found the LiftMaster MyQ 7675 Garage Door Opener to be a prime example of that. when I use smart things to activate the garage door it does not beep or do anything. When I send a command, the beeper beeps and the strobe light flashes. Your home will also need a strong Wi-Fi signal to be able to control and monitor your garage through the myQ App. Thank you for all the info. If so, this might be happening. . So I popped open the GD00Z-4 and found a mechanical AZ957 Subminiature PC Board Relay. It worked perfectly! The other side has the switch and terminals. Apparently there is a law which requires this type of garage door opener device to wait at least 30 seconds between operations. So to do this hack, just short SS to COM on the garage door controller, then splice the controller’s wires to the stock push button’s wires, which will allow the stock wires to be shorted despite the communication noise, thus opening the door? and was experiencing the same problem as you: The Linear could open/close my garage only when the wall switch was completely disconnected (rendering the wall switch useless). Thank you. I have a Liftmaster 8500 garage door opener and a MyQ 888LM Button connected to it. ... My only qualm with the whole setup is that the powercord of the GD00Z-4 is only about 3-4 ft which I have used an extension cord, but will install a new outlet once its not freezing outside. Which terminals on the Liftmaster did you plug the GD00Z-4 into? Let us know how it turns out. ; but, I do not use any of that. by that i mean the normal wall button and the wireless controller can still control the garage door, but… The button the linear device is soldered to will not control the garage door and when I use smart things to activate the garage door it does not beep or do anything. Did the exact same thing on some linear openers for my craftsman (liftmaster rebadge) and it works! Your posts saved me a bunch of grief trying to figure out that one. I’m posting my findings here for your entertainment. How to create a MyQ account; Tap myQ Smart Garage Hub on the Device Setup screen. After a little investigation I discovered that the GD00Z-4 monitors the relay contacts to see if it’s connected to an opener. I have a Liftmaster 8500 garage door opener and a MyQ 888LM Button connected to it. Thanks for the info…I have a liftmaster 8065, but short the SS to COM doesn’t solve my problem. And that still works, so I am happy. And I understood something – the reason the wireless remotes and external relays work is because they isolate the GD00Z-4 from the communications “noise.”. I got the wireless remote and soddered the wires on the board on the button terminals. It shows up in my SmartThings app. But knowing that the transistor just shorts SS to ground, I decided to simply do that. When my continuity tester was connected to the GD00Z-4, SS was a steady low (close to 0V). A HUGE thanks to you for taking the time to explore this and to share your solution!!! Visit our Support Site for articles and videos on myQ connectivity. This makes the contacts polarity insensitive. I should probably subtitle this “How I Broke My Warranty.”. Shorting the two wires to the fancy push button does indeed open/close the door. Outstanding! I want to second this post as brilliant! My only qualm with the whole setup is that the powercord of the GD00Z-4 is only about 3-4 ft which I have used an extension cord, but will install a new outlet once its not freezing outside. Like many people that bought Linear’s GD00Z-4 “Garage Door Opener Remote Accessory,” I was surprised when it refused to open my garage door. My guess is its constantly sending a signal to the button, am I wrong? No hassle and basically in spec. Occasionally, they pull them too. I use a vera home z-wave controller. I am going to go out on a limb here, and assume that the SmartThings connected button works again after about one minute. Make sure they are both working independently. What do you think? Good Luck! It’s not that the controller differs greatly from […] I’m hoping this works through the winter since we’ve had -20C (-4F) a few days. Did the GD00Z-4 open the door, but prevent other accessories from working? Download the free myQ App, and purchase either a Chamberlain Smart Garage Hub, or upgrade your existing garage door opener to a smart garage door opener with built-in myQ connectivity. Create a MyQ account. The wall switch functions normally and the GD00Z-4 is successfully opening/closing the door. . After I use smartthings to open or close the door it stops working. @scurrier, since no one else answered your question… yes, after shorting SS to COM in the GD00Z-4, just connect its leads to the 2 wire screws on the back of the MyQ button. Just buy a lift master myq single button controller for about $10 and that can work in normally into a Chamberlain myq opener. @mcavoya Thank You! I assumed that was because of the one minute delay imposed by Linear. See if your garage door opener works with myQ controls and accessories. At the end, I connect wire to remote’s switch button, Which works very well…

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