Nest thermostat gen 3 not connecting to nest app

[Ajm88]

Hi, so I have been using the nest thermostat fine for year, I recently have a new boiler fitted so need to change from system boiler to combi. After carrying out factory reset to do this. I can no longer contact the thermostat to the app. I have tried everything I can find out this site, but nothing seems to work. I can use the boiler fine with the thermostat, so know that's all fine. But just cant get the thermostat to speak to my phone. I get so far in the set up process and then it comes up with choose number from the display, I just get a spinning wheel and no number on the display. Any help would be appreciated 

[VadiKus]

I’m having exactly same issue. The app on the mobile and termostat lost communication? The only way I can turn on central heating, by setting manually time schedule on the actual app. It took me while to figure this out but but it worki on my one.

[Yogx]

Same issue its been happening on an off few few weeks now it's completely useless 

[VadiKus]

I just wondering if replacing newest version will make difference or the app is gone from all devices ? The technical support is useless and can get any information. Have you any idea ?

[Ajm88]

Hi all, ive found a solution that worked for me, after hours wasted, it turned out I just needed to restart my phone, worked straight away after that. Hope it helps you all