The answer to 'air conditioner not working' is that there could be several common causes, such as a tripped circuit breaker, a dirty air filter, or a refrigerant leak. Symptoms may include the unit not turning on, poor airflow, or warm air coming from the vents. Solutions can range from simple DIY fixes like checking the breaker or changing the filter, to more complex issues that require a professional HVAC technician to diagnose and repair.
If the air conditioner is not turning on at all, first check the circuit breaker to see if it has tripped. Reset the breaker and see if that resolves the issue. You should also check the air filter and replace it if it is dirty or clogged, as this can restrict airflow and cause the system to malfunction. However, if the problem persists or you notice other symptoms like warm air or poor cooling, it's best to call in a professional HVAC technician to properly diagnose and fix the issue.