HVAC Repair Smithfield NC | Call Whitley Heating & Air Conditioning

Common signs include reduced cooling performance, longer run times, hissing sounds from the refrigerant lines, ice buildup on the evaporator coil, and higher energy bills. Since refrigerant leaks are a frequent issue in our area due to system age and wear, we recommend scheduling a professional inspection if you notice these symptoms to prevent further damage and restore efficiency.

Symptoms of a failing capacitor include the AC unit humming but not starting, frequent system cycling, or the outdoor unit not turning on. Capacitors often fail in Smithfield due to high summer temperatures and humidity causing electrical stress. Our technicians can test your capacitor and replace it quickly to avoid complete system failure during our hot North Carolina summers.

We recommend biannual maintenance—once in spring for cooling systems and once in fall for heating systems. This includes checking refrigerant levels, inspecting capacitors and electrical components, cleaning coils, and testing system performance. Regular maintenance helps prevent common local problems like leaks and capacitor failures, extends your system's lifespan, and maintains energy efficiency in our Johnston County climate.