Where is the ac compressor located? - 2005 Chevrolet Malibu

The low pressure switch (also known as the AC compressor switch) will be under the hood, it will be located in the low side AC line from the AC compressor, this is the larger of the two lines from the AC compressor. See picture below, looks like it has a three wire connector. Also what is the AC doing that makes you think this switch is defective? Cycling on and off constantly?

A haynes manual from your local auto parts store, autozone website has a parts locator.

I assume you mean the ac compressor dryer. It is located on the large low pressure suction pipe between the ac compressor and the firewall of the vehicle. It is about the size of a tall beer can and will have the large pipe going in one side and out the other.

Well, I think you can rule out the AC/heater fan inside the car. That would make noise even just sitting in the driveway.

Many/most vehicles are designed to run the AC compressor not only when the AC is on but also when the defroster is on. This is to keep the AC compressor lubricated through the winter months also.

It should not be a belt problem as that belt is always turning anyway which should then rule out the pulley bearing at the AC compressor.

I do suspect your problem is a major internal failure of the AC compressor. This can be easily checked by a technician [or yourself if qualified]. Locate the electrical connector at or to the AC compressor. Two people: With the AC turned on, in park, increase the engine speed so you can here the noise. Disconnect the AC compressor electrical connector. If the noise stops instantly, the compressor has failed. A quite expensive repair. Have a reputable shop locate a re-manufactured compressor for you. That will help some on the cost.
Bestaluckto you!!
M

The charging port is in the low side AC line from the AC compressor on the engine, the low side line is the larger of the two lines coming from the AC compressor.

compressor to the ac is under your hood what makes you think its not turning on have to have ac on for it to cycle what the ac doing

If it has the auto air functions.On the passenger side under glovebox remove the black cover under the dash and there is a hidden fuse block with a ac fuse. Check for this a very common issue. Also if the ac is fully charged you can unplug the low pressure switch located on the accumulator( silver canister located by the relays towards the firewall) and take a wire and place between the two terminals just make sure the compressor will does come on.If the ac is turned on and you jump that switch and the compressor does turn and ac starts working then a good possibilty that the low pressure may be bad. Would check the fuse first.

First you need to check if the compressor is actually kicking in when started and you can do that by looking at it and you will see if it is working or not. If not working you ned to check the folowing : 1- AC compressor is getting electric , if not check the relay for the AS compressor. 2- Check if the AC compressor's clutch is kicking in (that is the part that is located on the front of the compressor , where the belt is fitted) 3- Check the compression of the AC compressor via a proffessional.

front of engine down low on passenger side (access from under the car), there is no AC delete option so the compressor should be there and not bypassed, what is the question about the AC? it doesn't work?

if you are looking for the location just locate the ac compressor and it is on the side of the compressor close to the pulley
and sorry but can't understand question very well
if you can be more specific i will be too