so as may03lt and a few others really helped me out with tb issues and horn issue. my ride is great after getting some stuff replaced. now when i turn on the ac, an clicking type sound starts. the weekend before last i took my dog to the park in midland. i turned the knob over to 5 after our walk and it shut off. only to work on 5 after the car was running for a few minutes. thoughts? is it time to replace the clutch?
ac clutch need replaced?
- Thread starter Whoy
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jimmyjam
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doubt its the clutch. generally, when an ac clutch goes bad, it loses friction (gets gunked up or something) and when it tries to grab, it slips, causing a loud whine.
did it run on the other fan speeds, just not on 5? that would seem like a bad resistor pack relay to me...
did it run on the other fan speeds, just not on 5? that would seem like a bad resistor pack relay to me...
Jimmy's right. The AC compressor clutch in the engine compartment only works to supply cold refrigerant to the system.
Cabin airflow is entirely under control of the cabin blower (behind the glove box) and the resistor pack (next to the blower).
Cabin airflow is entirely under control of the cabin blower (behind the glove box) and the resistor pack (next to the blower).
The clutch cycles even if the refrigerant is at the proper level, to prevent it from freezing up the evaporator and turning it into a solid block of condensate ice.
As mentioned, the blower motor speed control is totally separate from the compressor, and losing speed 5 is the most common complaint.
Here's how to fix it:
http://gmtnation.com/forums/topic/2961-how-to-replace-blower-motor-resistor-pack-and-connector-pigtail/
As mentioned, the blower motor speed control is totally separate from the compressor, and losing speed 5 is the most common complaint.
Here's how to fix it:
http://gmtnation.com/forums/topic/2961-how-to-replace-blower-motor-resistor-pack-and-connector-pigtail/
Robbabob
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Dang, y'all got here before I could comment!Whoy said:
I think the clicking sound and the lack of fan blowing are different issues. I just replaced the resistor pack in our truck... speeds 1 and 2 didn't work, and 5 only worked after a few minutes of driving (didn't work if you immediately set it to 5). I was very embarrassed to find how easy a fix this is.
Your ticking may be something different... idler arm, water pump (fan clutch mounting location), pulley...
Edit: seriously, the fan speed and clutch have nothing to do with each other.
edit 2: If I'm not mistaken, the idler arm is below the compressor clutch. (Not sure if I've confused my Dakota and the Trailblazer). Watch the idler arm... if it bounces then it's bad. It should run smoothly and tight at all times. Maybe a little movement, just no constant bouncing.
jimmyjam
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the compressor may be making noise due to the fan not running, causing it to start getting cold. I'm not as familiar withi auto hvac as I am with regular hvac but I know when a system freezes up to the compressor it don't sound right. or it could be something totally different and since you're just looking for a problem you assume the noise isn't normal
in any event, if the compressor was the problem, the fan would still blow on 5. it's textbook resistor pack relay
in any event, if the compressor was the problem, the fan would still blow on 5. it's textbook resistor pack relay
well im not "looking" for a problem at all. but the clicking/clanking is coming from the ac compressor/clutch/pulley. you only hear it when the ac is turned on therefore the clutch is engaged. it never made that sound before so im not simply imagining it maybe just a bearing needing replacement. i will also probably go ahead and replace that part in the blower motor. as well and get freon checked. justt curious if anyone had that same sound coming from the same spot. if possible i will upload video tomorrow.jimmyjam said:
edit-resistor pack relay.
dla442
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Do you realize when I see Beiber I have an uncontrollable urge to punch something....lol
Experience on a clutch...when they die no engagement and inconsistent. Debris will be seen as well around the compressor from the clutch which is very noticeable and can mistake the noise it makes
It's the silver can on the passenger side of the firewall where ac lines go into it. Slightly octagonal shape to the top.
JerryIrons
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Just to clarify, when you turned the fan speed to 5, did all of the air blowing stop? Not just AC but zero air blowing regardless of temp?Whoy said:
PProph
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chiming in I'm suffering a failing compressor clutch on my 95 lesabre, I can't comment on the resistor pack suggestion, but if the sound is coming from the area the op describes i agree that it could be two separate problems and that clutch is worth looking into. In my research (obviously for a different vehicle but I assume the rule of thumb would be the same) it is suggested that if your A/C compressor clutch is going, the compressor itself is often not far behind. So if that is in fact one of your problems I would check into the cost of replacing the whole thing vs just the clutch, and see if the investment is worthwhile. Obviously take that with the excellent advice found from the experts on this site and your own diagnostics before you make any decisions or throw any money at anything.
I guess you're missing our point, which is how OFTEN does it click. Once a second? Ten times a second. Once every ten seconds? Each of those things means a lot to a diagnostician.Whoy said:
And is the silver can chilly, even on speed 5 when the blower fails to run?
Every question means something. If you skip answering any, it slows down the whole process.
No, the low pressure switch could see low pressure and click the compressor clutch off. It all depends on the rate of clicking.
Texan
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I have listened to the video a dozen times, and it sounds to me like a bad bearing somewhere. The question is where.
It could be water pump, alternator, idler pulley, belt tension pulley, A/C compressor clutch, but why would it go away when
you turn the A/C off? Less load on the belt? You could listen with a stethoscope and try to isolate the noise, but be careful
around the fan. Can you post a video with the A/C off?
It could be water pump, alternator, idler pulley, belt tension pulley, A/C compressor clutch, but why would it go away when
you turn the A/C off? Less load on the belt? You could listen with a stethoscope and try to isolate the noise, but be careful
around the fan. Can you post a video with the A/C off?
Ric_Whit
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I have the same problem the same sound coming from the AC clutch when it turn on.
This sound clicking/clanking constantly with the AC on.
It is not the sound when the clutch engage, when it engage it will make the normal sound but then after it engage then it will keep making the clicking/clanking sound constantly.
On the old site http://forums.trailvoy.com/showthread.php?t=53918 there have a DIY on how to replace the bearing.
But that bearing is only for the AC compressor pulley and nor for the clutch.
Hope to have a solution for this.
This sound clicking/clanking constantly with the AC on.
It is not the sound when the clutch engage, when it engage it will make the normal sound but then after it engage then it will keep making the clicking/clanking sound constantly.
On the old site http://forums.trailvoy.com/showthread.php?t=53918 there have a DIY on how to replace the bearing.
But that bearing is only for the AC compressor pulley and nor for the clutch.
Hope to have a solution for this.
took to "AC Specialist". Called me a few hours later and said it was low on freon and a fitting on the high pressure side was leaking. he charged it and replaced the fitting and it cost 250. said the compressor was weak and will need to be replaced sooner or later. said i would have to replace the compressor, acctuator, and all the lines. will coat me 1050 if I havt to do that. said the cluth bearing is internal and could not replace that. still makes the sound but not as loud. what I dont understand is he said " its nearly out of freon that is why it was not blowing cold air at all". In which I replied "Its been blowing cold air". Only to get the response "it will be colder now" Its just as cold as it was.Ric_Whit said:
JerryIrons
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Replacing compressor and all the lines seems pretty extreme to me. I would consider taking it elsewhere for a second opinion.
If your blower fails on 5, no matter if you are heating, cooling, etc, you may have a failed fuse. Oddly enough, there is a fuse in the box under the hood, just for speed 5. It may be the fuse, or it may be the blower resistor, but check that fuse.
If your blower fails on 5, no matter if you are heating, cooling, etc, you may have a failed fuse. Oddly enough, there is a fuse in the box under the hood, just for speed 5. It may be the fuse, or it may be the blower resistor, but check that fuse.
Magyver
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The clicking and clanking with the AC on is sort of opposite the usual problem of the typical clutch bearing failure isn't it? From my experience the whining sound diminished when i loaded it by turning on the AC. It seems like clicking and clanking while engaged would a problem with the clutch itself. BTW when i did the bearing on mine i took the time to rough up the clutch surfaces with emery cloth and my AC works better and is much quieter when it engages. Not to mention quieter overall with the new bearing.
I know this thread is a tad long in the tooth but what the heck I'm a helper
I know this thread is a tad long in the tooth but what the heck I'm a helper