An air conditioning system may perform poorly for many reasons, including insufficient maintenance. When an AC system is not adequately maintained, it leads to dirty system components, including the indoor and outdoor coils, fans and blowers. Not performing routine maintenance also leads to small problems not being fixed, which can eventually cause a complete system failure. Be sure to have a reputable HVAC repair company inspect and tune up your system in the spring and fall to prepare for summer and winter. A clogged condensate drain also leads to poor performance. These drains clog often in humid climates like Austin, so have them checked regularly.