Wiring Issue with Nest

[Nksniper]

I have a heating and ac system. The previous thermostat had a R, W, Y, G, C, and W2 wire. I never had any issues with the setup. The instructions found online said to connect the W2 wire to the O/B* connector on the Nest Thermostat. When I connected it this route, the ac noww turns on when the heater turns on and no hot air blows out. Anyone know what might be causing this. I dont think i have a heat pump and i think if i keep the W2 disconnected my AC wont work when the summer comes around. Any help woukd be appreciated.

[Jhonleanmel]

Hi Nksniper,

Thanks for reaching out. I'd love to know more about this. Could you share a photo of your current thermostat's wiring? 

Thanks,
Mel

[Jhonleanmel]

Hey there Nksniper,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Best, 
Mel

[Jhonleanmel]

Hi Nksniper,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

Thanks,
Mel