Why is my AC making rattling, buzzing, or clicking noises?

Clicking is usually just the compressor or relay switching on/off — normal. Rattling often means a loose panel, screw, or debris in the outdoor unit — check for anything loose before calling a technician. Buzzing can point to an electrical issue or a loose fan blade, and is worth getting checked rather than ignored. A water-flow sound is almost always just refrigerant moving through the pipes — completely normal.

📐 Calculated estimate Based on real BEE-certified data — see the exact numbers below.

Most of these sounds have a genuinely simple explanation, and a quick visual check (loose panels, debris near the outdoor unit, anything visibly rattling) resolves the easy cases yourself. Buzzing is the one symptom on this list worth taking seriously — it's more often tied to an electrical component than the others, so don't wait too long if it persists.