The answer to 'air conditioner not turning on' is that there could be several common causes, including a tripped circuit breaker, a faulty thermostat, or issues with the condenser unit. The air conditioner not turning on can be a frustrating problem, but it's often a relatively simple fix that a homeowner can handle with some basic troubleshooting.
First, check the circuit breaker to see if it has tripped. If so, reset the breaker and try turning the air conditioner back on. If the breaker trips again, that could indicate a more serious electrical issue that requires a professional HVAC technician. Another common cause is a problem with the thermostat, such as a dead battery or incorrect settings. Try adjusting the thermostat and see if that resolves the issue. If the air conditioner still doesn't turn on, the problem may be with the condenser unit outside, which could have a faulty fan motor or other mechanical failure. This type of repair is usually best left to a professional HVAC technician.