Preparing your AC unit before the summer is a good thing to work on during the spring months. You wouldn?t want to have an AC unit that doesn?t work in warmer weather or wouldn?t be able to last the household towards the end of August. Ultimately, repair appointments may also be booked during August. AC repair in August is more common than usual because of the many HVAC units that need maintenance during warmer months. It?s a good idea to schedule an appointment for air conditioning services before the summer hits. However, you can do these do-it-yourself tips for your AC unit.