Outside A C Unit Not Turning On. An outside air conditioning unit may not turn on for several reasons, whether it's a simple issue, such as the emergency switch being off, or a more complex problem, such as a refrigerant leak—which only a licensed professional can repair. Dealing with an outside AC unit not turning on can be frustrating

To check for this: Locate the fan on the outside condenser unit If the outside unit gets too dirty, your AC compressor could overheat

If your outdoor unit isn't turning on, then the air conditioner will not be able to remove the excess heat, limiting the amount of heat the refrigerant can absorb from inside the home It typically happens when the AC is overloaded or has a short circuit If your outdoor unit isn't turning on, then the air conditioner will not be able to remove the excess heat, limiting the amount of heat the refrigerant can absorb from inside the home

. There is a most common reason for the outside AC unit not turning on On-Off: When your outside AC unit is not running, sometimes it's as simple an on/off switch being accidentally turned off

. How to fix: Once a unit reaches the end of its life, the only. If the outside unit gets too dirty, your AC compressor could overheat