AC-Appliance Pros Do It Yourself Information A central air conditioner is not a household appliance. It's a complex self-contained system that requires professional maintenance and repair. That's why attempts at "do-it-yourself" repairs on an in-warranty unit may void the remainder of your warranty. Other than performing the simple maintenance recommended in this site, you should not attempt to make any adjustments to your central air conditioning system. Your dealer will be able to take care of any questions or problems you may have. If you don't know which firm to call, ask if the contractor is a member of the Air Conditioning Contractors of America (ACCA). consumers can call (972)247-5383 or 1-800-260-8041 to confirm the contractor is a member or to locate a contractor who subscribes to the organization's code or ethics. ©2007 AC-Appliance Pros All Rights Reserved 1701 North Greenville Ave. Suite 606 Richardson, Texas 75081 972-664-0055 TACL B00027067E