The AC unit won't turn on.
No cool air coming is out of the vents.
The thermostat display is blank or room temperature doesn’t seem to match with the setting.
Strange noises are coming from your AC system: Screaming, Knocking, Metal on Metal, Gurgling, Clicks.
Water is leaking inside & around your indoor AC unit.
AC keeps turning on and off, short cycling.
AC Unit is icy or frosty.
There’s a bad smell coming from the vents: A moldy, mildew smell or A rotten egg smell.
Utility bills became abnormally high - Leaking ductwork or Refrigerant is low.