No. If you need to replace it you pay for it.
If it works properly, never.
If your referring to the cooling portion of your central air conditioning the answer is no.
Simple answer NO.
Never, unless you have a leak.
There are a few instances that will allow ( I am assuming when your saying inside unit you are referring to the the circulation fan for your building ) the inside unit to run. Check the "mode" on your thermostat. Is selected to auto fan? this will allow the the fan to run continuously regardless if the air conditioning is cooling or not . If the thermostat is switched to the heating mode the furnace will be operating and the air conditioning unit will remain inoperative while the furnace mode is selected. Is the inside unit running and no cool air is being produced while the air conditioning mode is selected ? Contact your HVAC&R technician to trouble shoot the unit.
A "gas furnace" is called a furnace, an "electric furnace" is called an Air Handler
As a homeowner, you might have several tasks and responsibilities. One of those tasks is to repair your Air Conditioner or schedule a tune-up every year. But there are times when you may have to replace your AC rather than repairing it. Many questions may follow this. How do you know it’s time to replace your air conditioning unit? How often do you have to replace it? Which AC contractor in Los Angeles, CA, should you choose? Read the blog to find answers! visit: Platinum Air Conditioning