How do I know when to replace my HVAC system?

Signs it is time to replace your HVAC system include the unit being over 15 years old, frequent repairs, rising energy bills, uneven temperatures throughout your home, and strange noises or odors. If repair costs exceed 30 percent of a new system's cost, replacement is usually the better financial choice. A professional HVAC contractor can assess your system and provide an honest recommendation based on its condition and efficiency.