The answer to 'why is my condenser not heating' is that there could be several common causes, such as a faulty compressor, a refrigerant leak, or an issue with the thermostat or electrical components. The condenser is the outdoor unit that releases heat from the refrigerant, so if it's not heating up, it's likely not functioning properly.
Some common symptoms of a non-heating condenser include the unit not turning on, the compressor not running, or the air coming from the unit not being warm. Solutions can range from simple DIY fixes like replacing the thermostat or cleaning the condenser coils, to more complex issues that require a professional HVAC technician to diagnose and repair, such as a compressor failure or refrigerant leak.