Run Capacitors

Nearly all air conditioning units have at least one capacitor. The capacitor stores electricity and releases it during the startup of an electric motor to give motors an extra jolt of power. It also smooths out voltage fluctuations to protect compressors and fan motor from damage.  

Capacitors can degrade slowly, providing less startup power over time. Or they can fail in an instant. Gradual capacitor failure can go unnoticed for a long time, stressing the compressor and fan motor windings, resulting in their early failure. Since capacitors are cheap, it pays to proactively replace yours about every five years.

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