the fan is not working after installing nest thermostat

[mountainyatra]

Hello, 

I just installed my new thermostat today, heat is working but the fan is no longer working. It was working fine with my old thermostat before installing nest. The green wire is properly connected to 'G'. Is there anything I am missing? 

[AK1612]

We’re you able to solve the issue? I am having similar problem. Fan doesn’t work

in auto mode..

[As4]

I’m having the same issue. Nest please respond!

[NoPushups]

Also having this issue.

[As4]

I fix the problem on my end. My nest is connected to a PTAC unit. The sensor on the pipe where the radiator heat comes into the unit was not connected. Therefore the fan would not kick on.

[Bowtiebaby]

Each season the system goes down any ideas?