Before you try to connect to your Google Home, you must have connected your air conditioner to the +home app.
To do this, please follow the steps shown in this guide
Open the Google Home app, go to the 'Devices' tab and click 'Add Device/Add' Button.
A new tab will open called 'Set up a device'. Select the option 'Works with Google'.
Using the search bar, search +home app and hit continue.
You will then be asked to link an account to control your appliance on any device. Link the accounts and follow the Google instructions to set up the appliance.
Enjoy the benefits of controlling your air conditioner via your Google Home. From turning the air conditioner on and off, adjusting the temperature and changing the fan speed, you can now relax and enjoy a perfectly comfortably environment with ease.
Now that you've connected your air conditioner to your Google Home, you can find out all the other benefits of having a Westinghouse air conditioner here