What is a Capacitor?
One of the most common repairs during the summertime is replacing a capacitor on an air conditioning system. The role of the capacitor is to help start up the motors, such as a compressor or fan motor, in your HVAC system. The voltage from your electrical panel is not enough to start these components and needs the help of the capacitor.
Is your capacitor bad?
The most common symptom of a bad capacitor is if a motor isn’t running or perhaps your outside unit (the condenser) isn’t running. So before you call your local HVAC contractor, you can do a visual inspection of the capacitor. The other method requires a multi-meter that can measure microfarads.
Anytime you work on or look at some type of machine, safety is a must. If you have absolutely no idea, call a local air conditioning repair company to help solve the problem. Turn off the power to your outside unit by flipping the breaker to off or at the disconnect. Open up the electrical panel to your outside unit. The cylinder like object in there is your capacitor. If the top of it is domed, it is bad and will need to be replaced.