The answer to 'my maintenance won't turn on' is that there could be several common causes, such as a tripped circuit breaker, a faulty thermostat, or an issue with the HVAC unit itself. Symptoms may include the system not powering on at all, the fan not running, or the unit not producing heated or cooled air.
First, check your circuit breaker to ensure it hasn't been tripped. If the breaker has been tripped, simply reset it. If it trips again, there may be an electrical issue that requires a professional HVAC technician to diagnose and repair.
Next, check your thermostat to ensure it's set to the correct mode (heat, cool, or auto) and that the temperature setting is appropriate. Try adjusting the thermostat to see if that resolves the issue. If the thermostat appears to be malfunctioning, it may need to be replaced, which is a job best left to a professional.
If the circuit breaker and thermostat are functioning properly, the issue may be with the HVAC unit itself, such as a failed component or a lack of airflow. These types of problems are best addressed by a licensed and experienced HVAC technician, as they have the necessary expertise and equipment to properly diagnose and repair the issue.