I have a 96 dx coupe, it makes a really high pitch squealing sound when i turn the a/c on and goes for about 10 seconds turns off then goes again around 10 seconds later and keeps doing this until i turn the a/c off. The compressor is brand new so i have absolutely no clue what it is. From the look if it it seems that the a/c clutch stops and thats when the squealing starts. Please help me if you have a clue as to what this is.

 

Is the belt tight? Does the condenser fan work?

 

the belt is as tight as it gets and the condenser fan is working. any ideas???

 

Why was the compressor replaced? Were any other parts replaced? Was the system properly evacuated and charged with the correct amount of refrigerant (by weight)? Is the amount of oil correct?

And, what are the operating pressures?

 

Thats the problem i have no clue, i just bought this car about 2 weeks ago and thats the only problem it has at the moment. I know the compressor, waterpump, distributor, and spark plugs were changed. Is there a way i could flush the system in order to put in the proper amounts from a clean slate because i do not know otherwise as to how to check if it is at the correct levels.

 

I suspect that the high side pressure is way too high, naturally that makes the compressor hard to turn, eventually the belt or the clutch slips.

You can confirm or rule out that by connecting a gauge manifold, starting the compressor, and observing both pressures.

Reasons for excessive high side pressure would include:

Condenser fan not working (ruled out)
Overcharged with refrigerant or oil
Refrigerant contaminated with air (neglected to use vacuum pump before charging)
Condenser blockage (metal bits of old compressor, or stop leak compound)

A blocked condenser should be replaced. It is generally impossible to clean out parallel flow ones such as the Civics have.

Knowing some history would help a lot here. I'm going to assume that the old compressor blew out, and they just slapped a new one on without doing anything else. In that case some major stuff is in order to get rid of compressor debris. I would suggest replacing the condenser, TXV, and receiver, flush or replace the evaporator, flush and thoroughly dry the lines, drain and refill compressor with the specified amount of oil (4 oz I think), evacuate and charge by weight.

If you find stop-leak in the system, everything (that handles refrigerant) has to be replaced. It can't be removed after it hardens in the components. Needless to say, never use stop-leak. It seldom stops leaks anyway.

 

Thanks so much i'm going to see to it that i check that out as soon as i come back from out of town which should be a about a week. So as soon I work on it i will let you know the result