Anyone with an AC unit knows not only how vital these machines are for comfortable living but also how important it is to keep them well-maintained. If you do not maintain your AC, you could face expensive repair and replacement costs. When issues do present themselves, it can be tempting to repair or replace parts of the AC system yourself. But, before you make this bold move, you should consider these factors. First, a home repair could void your insurance. Second, you could face additional costs if you make a mistake and need to call an expert to fix your repair job. And third, there are safety risks associated with DIY repairs.