MCOflyer
Topic Author
Posts: 7071
Joined: Tue Jun 13, 2006 5:51 am

Air-conditioning Problem: Help Please

Thu Aug 30, 2007 9:56 am

Ok, today marks the 3rd week after I got my cars air-conditioning repaired and all of a sudden as I am pulling in to get gas it stalls. Well after I turn the a/c off it runs ok. It makes this large squeaky noise that wakes up my neighbors. In addition to that, every time I flick it on on the highway it wants to stall. Well, I wondered if any you are mechanics who would know what is wrong. The car is a 2000 Suzuki Grand Vitara.

Hunter
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Klaus
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:04 am

Sounds like a slipping compressor driver belt.
 
tz757300
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:11 am

Quoting Klaus (Reply 1):
Sounds like a slipping compressor driver belt.

Possibly, but it wouldn't explain the stalling.

Hunter, does that car have a belt solely for the compressor or does the car have a unibelt?

If it is a unibelt, the clutch for the compressor may be engaging, but not letting any much movement of the belt. If the car belt runs slow enough, shit happens and the car will stall. Yes, I know this is a farfeched idea.

Perhaps get it looked at by someone and see if it is throwing any engine codes. The squeaking is easily fixable, but the stalling is definately a bit more complex.
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airfoilsguy
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:13 am

Your air conditioning compressor is probably seizing up. When the compressor seizes it slows down the drive belt. This slows down or stalls the engine. Get a new compressor and that should fix the problem.
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GuitrThree
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:41 am

Yep... sounds like a compressor that is just about to freeze up... Nothing you can do besides replace it.. Hopefully, your repairs you paid for 3 weeks ago are under warranty.
Don't know what work you had done, but if they installed too much R-134, you are seeing the results, as too much almost ALWAYS results in a seized compressor... you might want to run back quickly and get them to check your R-134 level, they might be able to let some out and things might level out, but I doubt it. Damage has already been done, probably. Of course, if you had major work and they neglected to flush the remaining parts of the system, you could be seeing the results of that mistake too.
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MCOflyer
Topic Author
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:50 am

Guys, my car is not stick. How much is a compressor going to cost? Its not under warranty by my dad is going to call the general manager and complain. I appreciate the info.

Quoting TZ757300 (Reply 2):

Perhaps get it looked at by someone and see if it is throwing any engine codes.

Explain. It tends to wanna die when I have it on as I accelerate.

Hunter
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tz757300
Posts: 2725
Joined: Mon Aug 08, 2005 6:21 am

RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:56 am

Quoting MCOflyer (Reply 5):
How much is a compressor going to cost?

Most start out around $100 for a re-manufactured one, but brand new is probably going to hurt your wallet just a bit.

Quoting MCOflyer (Reply 5):

Explain. It tends to wanna die when I have it on as I accelerate.

Throwing a code basically means something is wrong with the car and it will store trouble codes in its memory. You'll need a special tool to read the codes since most modern cars won't let you access it manually.
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TPAnx
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Joined: Sun Aug 07, 2005 4:53 am

RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 10:58 am

Quoting TZ757300 (Reply 2):
throwing any engine codes.

Hooking the car up to a diagnostic computer at a mechanics..to see if the car iss sending out codes which the
computer/mechanic can use to see what's wrong...
TPAnx
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MCOflyer
Topic Author
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 11:06 am

Guys thanks so much. Any more advice is welcomed. I need all I can get.

Hunter
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T prop
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 11:14 am

You just had it serviced and now it's acting up? Maybe the high side pressure is going to high, this makes the compressor hard to turn and it will make the engine bog down and cause fan belt slipping. Pressure to high can be caused by a few things like the system being overcharged, blockage in the system, Condenser fan failing to come on etc.

I wouldn't use the airconditioning anymore till it's been checked. If the compressor fails it can send shrapnel into the system and it's going to cost you more to have the system flushed. Another thing is some parts can't be properly flushed like the condenser, they'll need to be replaced, not cheap. Get it checked before the compressor dies.
 
lgbga
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 11:54 am

Quoting TZ757300 (Reply 2):
Perhaps get it looked at by someone and see if it is throwing any engine codes.

If you choose to have this done, it would be best to let a repair facility do it, not Auto Zone or Advance. They offer this service for free but a lot of times don't really know what they're doing since they can only tell you what trouble codes are and being that they only sell parts, alot of the people do not know how to do repairs and they might end up selling you something you don't really need. Look for a certified independent repair facility.
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falstaff
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RE: Air-conditioning Problem: Help Please

Thu Aug 30, 2007 12:13 pm

Quoting Klaus (Reply 1):
Sounds like a slipping compressor driver belt.

That would make the noise, but the stalling is probably the clutch (of the compressor) not releasing when extra engine power is needed. Most cars built since the 1980s have a compressor shut off switch that will kick in when the engine is under heavy load. This allows for smaller engines to turn A/C compressors, without a lot of power loss. . When you jam on the gas the A/C compressor clutch usually shuts down. You don't notice anything inside the car because it doesn't last long enough for the cold air to go away. If the switch fails the A/C compressor will stay on all the time that the A/C switch is on. This will cause smaller engines to stall at low speed or under heavy load. The A/C compressor draws a lot of power. Back in the days of big engines and massive compressor like the GM A-6 and the Chrysler V-2 it was no big deal and a switch was not needed. The only switch was for when the A/C needed to cycle and that was controlled by electro-mechanicly. Today's engines the A/C is electronically controlled, even on cars with mechanical climate controls.
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