Heating Or Cooling Problems? Get Your Solution Right Now. When you call Overholt, you can expect: 24-Hour, 7-Day Service. Get service at your convenience. Theres no need to wait. Your home is your largest investment. And our job is to keep your home comfortable. For over 40 years we have helped thousands of clients enjoy a comfortable home environment all year. There are numerous ways to bring comfort to your home, but we have always believed the best way is what fits your life and your budget. We're proud that we have built a reputation of honesty, quality, and professionalism not only with our clients but with our co-workers as well. Whether we're at your home for service or installation you will quickly appreciate that all of us at Overholt Heating have one goal in mind - Perfection.