If your latest electric bill made you do a double-take, you’re in good company. Many Grapevine homeowners see their highest energy bills of the year during the hottest part of summer. While rising temperatures play a role, an unusually high bill often signals that your AC system is losing efficiency. Our team at Coventry & Gattis A/C, Inc. has been helping North Texas homeowners stay comfortable since 1971. Over the years, we’ve learned that energy bill spikes rarely happen overnight. Instead, most systems show warning signs long before homeowners ever notice a problem. Here’s what to watch out for.