The answer to 'maintenance not working' is that there are several common causes, including clogged air filters, issues with the thermostat, or problems with the HVAC system itself. Symptoms may include poor airflow, uneven heating/cooling, or the system not turning on at all. Solutions can range from simple DIY fixes to more complex repairs that require a professional HVAC technician.
For example, a clogged air filter can restrict airflow and cause the system to work harder, leading to higher energy bills and potential damage. This is an easy DIY fix - just replace the filter every 1-3 months as recommended. However, if the problem is with the thermostat or a more complex component like the compressor, it's best to call in a professional HVAC technician to diagnose and repair the issue.