Low Oil Level Causing Howling Noise in Air Conditioning Compressor?

Could the reason for a failing air conditioning compressor be that the oil level in the system is too low? I had the refrigerant and oil changed in March this year, I suspect too little lubricant in the system. Leakage is audible above 1500rpm.

What kind of car?
Would you give your head that it's a compressor?

Mitsubishi Diamante. Installation on R12
100% that it is a compressor

If the compressor howls, it's the end of the compressor! Most compressors can't be repaired because the bearings on the pistons are made of aluminium alloy and are permanently embedded in the body, so if they seize, the compressor has to be replaced!BUT - you should first check the bearing on the compressor pulley - it also howls when it seizes, and this element is actually replaced at a cost of about 150zl (bearing 100 and work for 50).I have the same problem! I went to the A/C service and they added 120ml of oil to the system and told me to drive "until it breaks down".
It's still possible to drive because all you have to do is disconnect the air conditioning and it doesn't work!

Is it possible that it is "over" after 250,000s? Because I've heard that compressors can easily last for over 300,000 km.

Added at 14 [minutes]:

PS. Maybe someone knows what type of compressor is in the Mitsubishi Diamante - I mean: piston, multi piston, or vane....

The best thing to do is to go to an A/C service centre and ask them to add oil to the system for 120 ml... The compressor will still be howling, but 70% of compressors are still running for about 3-4 years with the oil topped up. So what's the harm in taking the risk? If it fails, you can simply switch it off and continue driving. Filling up the oil costs about 30-40zl.
And check if it is the bearing on the pulley as I wrote earlier.

the bearing would be out with the air conditioning off
..............................
PS. how is the oil refilled in a system with a working fluid? Because when the working fluid is changed, oil is automatically sucked into the system after it has been drained.
Is it possible that the noisier operation of the compressor is caused by the fluorocarbon agent added to the working fluid in order to find a possible leak?
I have seen in the automotive classifieds that A/C compressors can be reconditioned, is this possible?

Well fact...the bearing would howl with the air conditioning off....

Filling up is done by connecting the hoses in the same way as for filling up the air-conditioning system, but instead of this device, a certain amount of oil is manually poured into the system. The fluorescent medium does not cause noise in the compressor. There are workshops that remanufacture compressors, but not every compressor can be remanufactured. Find out what type of compressor you have - its number - and call these workshops to ask if they can remanufacture it and if they will give you a guarantee. If not, goodbye.

To Fabi7:
do you always have this compressor howling, or is it like jaceks25's colleague above a certain engine speed ???? I have a howling, or maybe even more of a knocking around 900-1100 and then it is quiet.

I have a howling sound from about 900 to 1200 rpm and then it's quiet.Before I didn't go for an oil top up, when I held the accelerator at exactly 2,000 rpm and switched on the air conditioning the revs dropped to 1200!!!!!
And now, after topping up the oil, it's still at 2,000!

I've already changed the oil twice this year without any positive result It's driving me crazy and on top of that it's now cooling down to -3 degrees,it's almost making me cry.... .

You don't change the oil, you just top it up for better lubrication. However, by topping up the oil in the system, the compressor will still howl because it's already seized, but it won't seize as much! -3 degrees has the air coming out of the grilles, you understand? Definitely too much! The correct temperature is between 4 and 8 degrees.You have an overly efficient compressor hehe .
You can preserve yourself for old age and freeze (joke )
The heater is responsible for heating the air to the desired temperature which flows from the compressor to the cabin...check it!

I have a 90% vane compressor. Even with a minimal amount of oil in the system I can't imagine how this compressor could seize.....
I called a guy I know who works at daewoo aso, among other things with air conditioners, and he gave me the idea that the filter in the circulation system might also be clogged. He called it something, but in any case it is used to purify the working medium (R12) and this can cause the compressor to work noisily, as it is very powerful (it gives out a lot of pressure).

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PS. apart from this howling, this is apparently the cause of such a considerable load when the air conditioning is switched on and the revs drop considerably....

A simple filter, otherwise known as a dehydrator-expansion valve system.

Yes, supposedly there is a filter in the system, but there is also a high pressure sensor (at least in my case on R134a), which should switch off the compressor. And the question is still - did you have the system unsealed for a long time, if not then the filter is out, see a fridge, it can run for so many years and is OKI. At my place, supposedly the pressure was supposed to be too high too, but after measurements it turned out to be OKAY, but it cools below normal and makes noise.
And by the way, if you can actually drive with a noisy one, then drain the subject with water, top up the oil as "fabi7" writes, why combine with repairs, when it is on the finish anyway and the effect of the repair may not be adequate to the money spent. Although, the topic is worth a look.
ps.
I changed the oil twice, because I swapped the compressor twice (the other one leaked and I have the original again ) And the heating has nothing to do with it, because the heater is behind the provender. As soon as the temperature on the evaporator goes below 0 degrees, it causes it to ice up, and that's a bummer, it can blow something out and on top of that it reduces airflow, and what amounts of water it generates ....

That's the thing about unsealing the system. When I bought the car, the system was completely empty, no refrigerant. We suspected a leaky system. But after filling it up, it's been 4 months now and nothing has escaped.... So I am even more convinced that it could be the filter....

AA... also, the guy who did the filling suspected that the system was previously filled with R132a and that's why it completely escaped....

Is this possible?????

If there is a leak, both factors would escape....

But I am saying that there were no leaks.Checked UV. The car is 100% accident free. All A/C components have been checked and are factory untouched. Therefore, I do not know what the cause of the total lack of refrigerant was... It is well known that an A/C system with R12 cannot be charged with R132a as the molecules of these gases are different. Therefore, in order to convert it in the first place, it is necessary to replace the hoses. and therefore it could escape....
At least I think so .

Hello.
Compressors can be remanufactured. And still get a warranty .1/3 to 1/2 the price of a new one.
Greetings.

I recently had the same affliction in a '92 Toyota Camry

First, on one hot day on the road, the air conditioning suddenly switched off and the LED on the A/C button started flashing. Then it cooled worse and worse. Over time I noticed that the compressor made a terrible noise. Unfortunately, it was not worth it to recondition/repair it. I bought an identical, working one on allegro for 300 pln .

After replacing and topping up the refrigerant it cools to 5.5 degrees.

P.S. It is possible that it seized, because there was almost no refrigerant in the system (only vapours, as they said at the point where I went to extract gas)