The answer to 'maintenance not working' is that there could be several common causes, such as a clogged air filter, a malfunctioning thermostat, or an issue with the electrical components. Symptoms may include poor airflow, inconsistent temperatures, or the system not turning on at all. Some solutions you can try at home include replacing the air filter, checking the thermostat settings, and resetting the circuit breaker. However, if the issue persists or you're not comfortable troubleshooting the problem, it's best to call in a professional HVAC technician to diagnose and repair the system.
Regular maintenance is crucial for keeping your HVAC system running efficiently and preventing larger, more costly issues down the line. It's generally recommended to have your system serviced by a professional at least once a year, usually before the start of the cooling or heating season.