There are times though where you might hear a squealing noise when you engage the air conditioning system.
Noisy air conditioner compressor car.
If the compressor pulley bearings are failing they can make noises generally a grinding roaring or squealing noise.
Most people who wonder what does a bad ac compressor sound like don t know about the moisture leaks in the ac compressor.
In this situation the buzzing sound is caused by liquid refrigerant entering the compressor intake port.
Bad car ac compressor symptoms ac compressors endure a lot of stress.
Since car air conditioning systems get turned on and off constantly this power fluctuation puts a lot of stress on the compressor.
If you have isolated the noisy air conditioner to your condensing unit the outdoor one or packaged unit itself.
Your air conditioning compressor has a refrigerant which is responsible for keeping the temperatures within at a manageable level.
If loose tighten them but check the inside panels before the outside panels.
Normally you should hear or feel nothing when the air conditioner is working except the cold air coming from your car s heating cooling ducts.
Then check all exterior and internal panels.
Over a certain number of years this stress will wear down the compressor and cause it to eventually malfunction.
This high wear part often needs replacing especially if you live somewhere where you re constantly running your car s ac.
If that refrigerant floods into the compressor crankcase then you are going to have some additional noises possibly.
The loud noise when the ac switches on is another potential symptoms of bad ac compressor.
Then when the unit kicks on they could hear a noise.
A buzzing noise from the compressor when the air conditioning clutch is engaged is a sign of an overcharged system.
You will usually notice noise of this nature when the compressor is just starting up.
Again start by turning the ac unit off with the cb disconnect and with the thermostat.
The most valuable solution is changing the whole ac compressor.
If the serpentine belt is worn it can slip when the compressor engages causing noises.
An air conditioner compressor beginning to fail a compressor pulley or serpentine belt that is beginning to wear out or the compressor clutch can cause a rattling noise.
If your ac compressor is beginning to fail it can make a rattling noise.