Air conditioner making rattling noise and not cooling

Why is my air conditioner making noise? Is this normal, or are noisy air conditioner under a threat?

New air conditioner rattling noise

Rattling when ac is on in car

How to fix a rattling ac unit

Outside ac unit making rattling noise

Rattling when ac is on in car when parked

How do I fix AC that is making noise?

If an air conditioner runs smoothly, nobody notices it. If, however, an AC starts making noises, we are right to be alarmed. AC noises are not just a bother to our ears and hearing; an air conditioner making loud noises spells nothing good for the unit itself.

In some cases, you can repair a loud air conditioner yourself.

That’s the best-case scenario.

Air conditioner rattling noise window

The worst case are costly repairs or replacing a noise-generating air conditioner.

There are 10+ types of AC units making various kinds of undesired pulsating, buzzing, or even clacking noises.

These noises come either from the compressor, fan, air handler, and so on. With ducted AC units or mini-splits, AC’s inside the unit could be making a loud noise, or the outdoor unit.

It is important to differentiate between a loud AC unit (normal operating noise levels) and an AC unit that started making noises (concerning noises).

We will go through all kinds of noise

clicking noise when ac is on

knocking noise when ac is on