Air Conditioner Capacitor

An air conditioner capacitor stores electrical energy and releases it as needed to power the motor that runs the compressor and the fan. The capacitor is essentially a battery for the HVAC system, providing the initial burst of energy needed to start the motor and keep it running.

There are two types of capacitors commonly found in HVAC systems: a start capacitor, which provides the initial burst of energy to start the motor, and a run capacitor, which provides a steady flow of energy to keep the motor running. 

HVAC Capacitor wear out over time and need to be replaced. Signs that a capacitor may need to be replaced include a humming or buzzing noise coming from the HVAC unit, the unit not turning on, or the unit turning on and off frequently. If a capacitor is suspected to be malfunctioning, it should be tested by a qualified HVAC technician using a capacitor tester.

When replacing a capacitor, it is important to match the replacement capacitor to the original capacitor in terms of voltage rating, capacitance, and size. Using the wrong type of capacitor can damage the HVAC unit and potentially cause a fire hazard.

It's important to note that working with HVAC capacitor can be dangerous as they store electrical energy. It's recommended to only be handled by a professional HVAC technician.

Other HVAC Controls Parts