How to know if the Air Con works on a White Rogers Thermostat?

So we have a White Rogers Thermostat in our house model IF-80 361… how do I know (outside of turning it on) if the air con part of the thermostat has been connected?
The heating works – I have it turned on now but nothing is happening – I know this probably sounds like the most ridiculous question but should I be able to see a vent in the house or something that should show it should work?
The landlord’s first language isn’t English and can’t understand what I“m trying to convey!

Thanks!