AC not cooling? Check these before you call

Check the thermostat

Make sure it is set to cool, the set point is below room temperature and the batteries are fresh.

Check power and the filter

Look for a tripped breaker and replace a dirty filter. A blocked filter can freeze the coil.

Then call

If the outdoor unit hums but the fan won’t spin, or you see ice, switch the system off and call. General information for a sample site, not professional advice.