With our ductless ac maintenance tips you can ensure that your hvac system has a long life. That is good considering the cost to replace it. You will also save energy and have lower utility bills. Most dealers offer service contracts but, with a little help, you can do it yourself and save. The usual dealer service contract can cost $200 or more. If your unit is for cooling only, then you will only need to go over this in the springtime. If you have a heat pump, then you will want to go through this in the fall as well as the spring.