Signs your HVAC system may be in trouble 

The life span of a heating and cooling system ranges from 15 to 20 years. Age can be a major factor in its functionality, which can affect your electricity use, in turn resulting in higher energy bills. Proper maintenance and lower use can increase the life of the equipment. 

Here are a few warning signs to watch out for if your heating and cooling system needs to be repaired or replaced: 

• Air conditioning is not as cool as usual. It could be a problem with the compressor or a refrigerant leak. Contact a professional to get the issue checked. 
• Poor airflow. If filter replacement or opening dampers doesn’t work, contact a professional; there could be a bigger problem. 
• Bad odors. Smells like burning metal, melting plastic or noxious odors are a sign that your system is in trouble; turn it off immediately and contact a professional. 
• Strange noises. Take note of any excessive or new noises that aren’t typical of the system’s fans and motors. Clunking, clanging or whistling noises? Turn it off and check the filter. If that doesn’t solve it, reach out to a pro. 
• Running frequently. There might be an issue if your system runs too often, or cycles on and off before completing the heating or cooling process. Contact a professional for a diagnosis.

Considerations 

Several factors come into play when deciding to fix existing equipment or invest in new equipment. Consider the severity of the issue, repair costs, the likelihood of additional repairs, equipment lifespan and your budget.

The efficiency of your existing system is also a consideration. Heating and cooling technology has come a long way in the last 20 years. Lower operation costs can offset the cost of a new system over time.

MIRANDA BOUTELLE writes on energy efficiency for the National Rural Electric Cooperative Association.