An HVAC system generally lasts anywhere from 15 to 25 years.  This number is variable and depends on several factors.  Your HVAC system life span can be reduced if it is not regularly maintained, has defective parts, underestimating the size of the system for your home, improper installation, improper usage, or harsh or corrosive environments.  Even with regular maintenance boilers, furnaces, heat pumps, and air conditioners can give out. Lack of maintenance is something you have the most control over.  Make sure that you have your HVAC system maintained and inspected regularly. Call Howell Services as soon as you notice that your unit may be having problems.  Small problems can quickly turn into larger, more costly issues.