Air Conditioning & Heating Source
There are three key items I look at to determine should I replace a system.
Certain signs indicate it's time to consider replacing ac/heating system, or improving the performance of your overall system. It may be time to call a contractor to make a change if:
One, your air conditioner or heat pump is more than 15 years old. Consider replacing it with a unit that has a higher SEER rating. Installed correctly, these high-efficiency units can save up to 20 percent on cooling and heating costs.
Two, your equipment needs frequent repairs. If you are constantly needing to have your system repaired to keep it operating then it might be time to replace.
Three, your cooling or heating equipment have become less efficient and costly. The system runs all the time regardless of cooling or heating sending your energy bills through the roof.