Preventative Maintenance keeps your heating, air conditioning and air quality control systems in top working order. Even if you haven't had a problem yet – knock on wood – your heating and cooling systems can break down without warning. And if it happens during the busy heating or cooling months, it can be more than a little frustrating to get it repaired in a timely fashion! Poorly maintained systems also cost much more to operate because they consume way more energy than a system that is regularly maintained.