The answer to 'why is my condenser' is that there could be several common causes, such as a dirty or clogged condenser coil, a malfunctioning fan motor, low refrigerant levels, or a problem with the compressor. Symptoms may include the unit not turning on, poor cooling performance, or the condenser fan not running.
The best solution will depend on the specific issue. Homeowners can try cleaning the condenser coil themselves, but more complex problems like refrigerant leaks or compressor failures should be handled by a professional HVAC technician. Attempting DIY repairs on the condenser or other critical components can be dangerous and may void the unit's warranty, so it's generally best to call in an expert unless the issue is very minor.