Hello!
Looks like this post is a few years old, however, I just found it today after having the exact same issue. Performing a factory reset corrected mine as well.
Another thing to consider if you are having issues:
When TZ Touch arrived, I tested it out at home, connecting it to my home wireless access point. The unit connected fine and remained that way, however, network information for weather, etc was not being received/transmitted. I received an alert on my home network that stated the connection was being refused by my network firewall because it was identified as malicious. I then connected it to my other network without the firewall, but still would not work. I then connected it to a mobile hotspot, and even my phone, but still no luck. I did a complete software upgrade and it would still not work. The factory defualt reset is what finally worked. It's almost as if the initial network block was retained in the Furuno unit.
Sorry for the long note, but wanted to let folks know who might have done something similar as me. If nothing is helping to resolve your issue, make sure your mobile router, firewall etc is not blocking the connection.
Hope this helps.
Wade