What Is an AC Capacitor?
A capacitor functions like a high‑surge battery. It provides the initial electric power (starting torque) to start the compressor and the fan motor on the outdoor unit.
Signs of a Bad Capacitor
- AC Just Blows Air: The compressor doesn't start, so no cool air.
- Crackling Noise: A brief “Ng…ung…” sound from the outdoor unit followed by a sudden shutdown (overload tripping).
- Swollen Body: If examined by a technician, the cylindrical cap can bulge or even explode, spilling liquid.
Warning: Never touch the capacitor terminals with bare hands because it can hold stray electric current that can be deadly.
Field Notes from the Pandan Teknik Engineering Team
The article above gives a general overview of issues we frequently encounter on site. However, each AC unit and room has unique characteristics (such as piping length, ventilation, and heat load). If you notice similar symptoms on your home or business AC, don’t jump to conclusions on your own. You can contact the Pandan Teknik team via WhatsApp to describe the problem in detail. We'll help analyze whether a simple service, spare part replacement, or a technical survey visit is needed so that the repair is targeted and cost‑effective.