Thanks for the suggestions. HondaLink didn’t work for warming the car again. It had all but one bar of signal strength as indicated when turning off the car. I’m trying to use the turn on climate option, I’m not trying to schedule the climate. I ended up starting the warming with my FOB.
It works sometimes from my phone, but not others. I can’t really figure out the difference as to why.
Connection issues that are not caused by low cellular signal are usually a problem with the Honda server. I have been using HondaLink for a year and a half on practically a daily basis, either for climate or for charging, and very rarely does it not connect. When it doesn't I usually just have to wait thirty minutes or so then try again and now it works, which is why I think it's a problem on Honda's end because nothing else has changed during that time. Maybe their server gets overloaded sometimes, or it's down for maintenance briefly and I just happened to catch it at that time, I don't know.
However I'm in the U.S. and you already indicated that in Canada they use a different cellular network. Also maybe HondaLink in Canada has its own server and doesn't use the same server as the U.S.
It could however be a problem with your specific HondaLink account, because some people have called HondaLink support with connection issues and they were able to fix it, probably by resetting that person's account or something. However those were usually situations where it never connected. An intermittent problem like yours is harder to diagnose, and they will likely try and say the problem is on your end. What I recommend is keep a log for a couple of weeks. Try HondaLink at least once a day, log the time, what you were trying to do, where the car was at the time, and also the exact error message that appears when it doesn't work. And ideally log the number of TCU bars each time, although I realize that takes an extra effort but otherwise they will say your cellular signal might be stronger at times than others.
You should be able to show a pattern that in identical situations (car parked in the same place, TCU bars the same) it worked on Thursday at 11:00 am but not on Friday at 9:00 am. But then it worked on Friday at 3:00 pm. After you have a couple of weeks of data call HondaLink support with this information, being ready to provide data that contradicts their claims, like they say maybe your car was parked somewhere out of range when it didn't work, you can say no the car was in the exact same place at 9:00 am that it was at 3:00 pm. At 9:00 am I tried three times in a row and got the same error message each time. Then at 3:00 pm under identical conditions it worked the first time I tried. TCU showed four bars in each case.
Also Start Charge uses the same connection as Turn on Climate, so you should experience that when Turn on Climate doesn't work that Start Charge doesn't work either. For the two week trial you should try both each time, so that if they start telling you well climate doesn't always operate if your cabin is already partly warm, you can say but Start Charge didn't work either.
Again it's very important in your log the write down the exact messages that appear on the screen when something doesn't work, not just a paraphrase of the message.