Nest thermostat wont power on AC condensor. New house not sure problem

[Johnsonroda27]

So we moved into our new house about 4 weeks ago and I immediately swapped out the Honeywell thermostat for a nest thermostat. The heating works perfectly fine, no issues. It's starting to be a little bit warmer so I thought I would try the AC. Once I turn on the air conditioning, the outside AC condenser does not turn on. Now we have never tested it with the old Honeywell thermostat either, so I'm debating swapping it back to check before I call in and complaint to the builder or if it's something on the nest side. I have included the old wiring from the old unit and the new wiring for the nest unit. 

 

 

  

[zoeuvre]

Hi Johnsonroda27, 

Uh-oh! I'm sorry to hear that your AC won't turn on after installing a new Nest Thermostat 2020. A few questions: 

1. Did you try using the Help Center or troubleshooter before contacting support? If so, which steps have you tried already?
2. When did cooling last work?
   • Check compatibility using the Compatibility Checker tool.
   • Gather all details of the old thermostat & HVAC system.
   • Check the make and model of the cooling and heating system, including the make and model for the, fan-coil or air-handler units.
   • Check if the HVAC system might be using a multi-speed or variable speed fan.
3. What type of system do you have? (Heat Pump or conventional type)
   • Did you verify if Fan and Heating still work?
      
4. Did you  turn off the power to your HVAC system?
   • Are the breakers turned on?
   • Did you recently experience a brownout or blackout?
   • Did you have any construction or maintenance work done on your home?
5. Did your utility company install a box on your HVAC system that turns the system off during high demand (peak) times to save energy? 
6. Have you experienced extremely hot weather lately?
7. Do you see a power error code on your thermostat?

I'll look forward to your response. 

Best,

Zoe