I recently started having a lot of issues with my new Garage Controller. The camera would not connect and I would keep getting the message to troubleshoot. The outlet it is plugged into along side of the garage door opener are connected to a wall switch which makes it easy for me to power it off and back on. Over the last few days the controller kept going off line and then would start working again later in the day. This morning despite turning the power on and off a number of times I could not get it to work. I got out the ladder and unplugged the USB power supply and replaced it with a different one. The camera and controller immediately came back to life. I felt I should dig a bit deeper and found that the power adapter I installed today had a power output of 5.1Vdc while the USB Power adapter I took out only had a power output of 4.86Vdc. I tested that unit after it was in the house for a few hours and the output remained the same. My testing leads me to believe that although the 4.86Vdc is plenty enough to power both the Garage Door Controller and the V3 Camera in warmer weather, they seem to require a bit more power once it gets really cold. My garage is not heated and the temperatures have been around -25C at night and have not risen above -12C over the last couple of days. So - if anyone is having problems with their units in cold weather - I suggest testing the USB Power Adapter output. (For those wondering - The adapter I was using was one supplied by WYZE)
I don’t use the Wyze Garage Door Controller because this home already had a myQ hub and compatible opener when I moved in. That thing seems to get finicky and go offline during hot weather, and two things have improved its performance for me:
- I connected the hub’s power to a smart plug that I can control through Google Home. The plug is set to turn itself back on when it’s been off for 15 seconds.
- I moved a range extender into the garage.
I don’t know if those will be helpful to others, but this seems like a good place to include them.
I’m glad you found a solution to your problem. Thank you for sharing! 
I like what @Crease said. And I too don’t use the Wyze controller. Oops, that doesn’t mean I don’t have a Wyze cam on my GD. Yes, I do. But I use other means to keep an eye on its status. But that’s not what my reply is about. I never use the Wyze power adapters. Years ago, I solved 90+% of my Wyze offline cam issues by removing the Wyze adapters. Yes, it was a second expense and worthy too. I replaced all mine (12+ at the time) power adapters with 2.1 / 2.3 amp adapters. As long as the voltage was ~5v, but the amperage was above 2.0 amp, I use it. A couple of them (not more than 2 at a time) share the same 2.3 amp adapter..
I think I remember when the V3+ cam came out, it had a 2.0 amp adapter. And it would hiccup if trying to use 1.0 And I think, early when the Wyze GD controller/cam was released it too was NOT a 1.0 So, I think this spells volumes about reliable service if you upgrade the adapter. But do what you wish, of course. Just doing what this forum is all about. Sharing experiences to save someone else learning the hard way or not at all.