The answer to 'condenser not turning on' is that there are several common causes, including a tripped circuit breaker, a faulty thermostat, or a problem with the condenser unit itself. The condenser is the outdoor unit in a central air conditioning system, and it's responsible for releasing the heat from your home. If the condenser isn't turning on, it means your air conditioning system isn't working properly.
Some of the most common symptoms of a condenser that's not turning on include warm air blowing from your vents, higher-than-normal energy bills, and the compressor in the condenser unit not running. The solutions can vary depending on the underlying cause, but may involve resetting the circuit breaker, replacing the thermostat, or repairing or replacing the condenser unit.