Nest 3rd Gen blowing hot on cool mode and vice versa.

[MarioDario]

Hi Guys.

My Nest 3rd gen blows hot air no cooling mode and vice versa. There is no heat pump in this setup. I have Y1, G, RH, C, W1, W2Aux wires.  Please let me know your thoughts. Thank you so much.

[Patrick_Caezza]

@MarioDario 

Give this procedure a try.

If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when it's in Cool mode), change the settings for orientation of your heat pump.

Nest Learning Thermostat

1.  On your thermostat, go to Settings.
2. Select Equipment.
3. Select Continue > Continue.
4. Select Heat Pump.
5. The Nest Thermostat defaults to an O setting for heat
   pumps. 
   • If the O option is highlighted, select B.
   • If the B option is highlighted, select O.
6. Test your heating and cooling again to make sure the issue is resolved.