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Set the temperature to “cool,” not “fan,” and reduce the temperature ... check the condensate drain line by turning the AC unit off and using a wet-dry vac to remove clogs from the line.

Sometimes, it’s easy to overlook that the thermostat might be set to off or heat ... What are some common causes of an outside AC unit not turning on? When your outside AC unit refuses to ...

An air conditioner not cooling your home properly ... If you see frozen coils or suspect some system component is frozen over, turn off your HVAC unit from the circuit breaker.

For those without central air conditioning, a window air conditioner can help bring down ... the insufficient airflow can cause the unit to not turn on. Oscar Aparicio, a heating and cooling ...