The Run Capacitor plays a critical role in the efficient functioning of the air conditioner's fan motor. It stores electrical energy, providing a steady supply of power to the motor during operation. The capacitor aids in maintaining a consistent motor speed, ensuring that the air conditioner runs smoothly and effectively. It is responsible for stabilizing the voltage and current flow, which helps in reducing fluctuations that can cause wear and tear to the motor. By doing so, the run capacitor not only enhances the performance of the RV air conditioning system but also extends its lifespan by reducing the stress on the motor.

One of the primary signs of a faulty capacitor is the air conditioner struggling to start or failing to turn on, indicating that the capacitor is unable to provide the necessary startup energy. Additionally, a humming noise from the air conditioner unit can be a sign of a capacitor struggling to perform its function. Overheating and shut down of the system shortly after starting are also common symptoms of a failing capacitor. In some cases, a visible bulge or leak on the capacitor body itself can be observed, which is a clear indicator of malfunction.