1. Dirty Air Filter
The most common cause of an AC not cooling properly is a dust‑blocked air filter. Air cannot circulate properly. Solution: Wash your AC filter yourself at least once a month.
2. Freon (Refrigerant) Shortage
Freon will not run out unless there is a leak. If it is low, it means there is a subtle leak in the pipe. Solution: Call a technician to locate the leak before refilling Freon.
3. Dirty Evaporator / Condenser
Mucus and dirt on the aluminum fins block heat transfer. Solution: Perform routine AC cleaning service every 3 months using a jet cleaner.
4. Weak Compressor Capacitor
If you hear a humming sound in the outdoor unit but the fan/compressor does not spin, the capacitor may be dead. Solution: Replacement of the capacitor by a qualified technician is required.
Field Notes from Pandan Teknik Technician Team
The above article provides a general overview that we often encounter in the field. However, each AC unit and room has unique characteristics (such as pipe installation length, ventilation, and heat load). If you notice similar symptoms on the AC in your home or business, it is best not to jump to conclusions on your own. You can contact the Pandan Teknik team via WhatsApp to describe the complaint in detail. We will help analyze whether a light service, spare part replacement, or a technical survey visit is sufficient so that the repair is targeted and cost‑effective.