Several signs indicate it may be time for an AC replacement. If your system is over 15 years old, requires frequent repairs, or your energy bills have significantly increased, it might be more cost-effective to replace the unit. Other signs include the AC not turning on or cooling properly, unusual noises, or difficulty finding replacement parts for repairs. Jerry Kelly Heating, Air Conditioning & Electrical offers free consultations to help you determine if an AC replacement is the best option for your Florissant, MO home.