Recommended Reading This means it will use less energy to cool your home, reducing wear and tear on your system. Recommended Frequency: Schedule a tune-up at least once a year, ideally in the spring before the cooling season begins, to optimize your system’s performance and efficiency.As you look over the drain line, pay close attention to any cracks or holes in the drain line which will cause your HVAC system to leak.Certain types of AC units will have a longer AC tune-up checklist, leading to higher rates from your HVAC contractor in Las Vegas. A whole house AC system, for example, will usually cost more to tune up compared to a top article simple portable unit which kan zijn much smaller, with fewer parts to check up on.