If your AC & Heater is not turning on, before calling your local AC Repair company check to make sure your thermostat is set to the correct mode, (i.e. Cooling or Heating). Then, check the power switch of your HVAC system located by the indoor furnace/ac (usually inside the mechanical closet, or in the attic if that’s where your indoor unit is). If this switch is flipped to “on”, check the breaker in your breaker panel, as well as the breaker located behind your outdoor unit. Lastly, check the batteries on your thermostat. If these mentioned steps do not solve the issue, call your trusted AC repair company to check out your AC or heating unit.