AC Compressor?

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Lugi20

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My AC has not been working lately, so I checked the system pressure with the car running and AC on full blast, 10psi, not even close. I figured thats probably why I'm not blowing cold, so I bought a can of r134 and a filler with a pressure gauge on it. I filled the system to about 45psi, and then tried again. Still no luck.

Is the AC compressor the lowest passenger side unit on the serpentine belt? If so, it looks like the clutch isn't engaging. How much and how hard is this to replace?
 
You got it.

First thing you need to do, however, is to figure out why your clutch is not engaging. Is this because of something in the HVAC control, or because your clutch is bad?
 
You need to know how much freon you have put into the system. to get it done right, you should take it somewhere, have a vacumn pulled on it to remove moisture, and check for leaks. Then charge with the correct ammount. 2 Lbs if I remember right.


Mike
 
My guess would be that the clutch is bad, I can't see the control unit going bad, when I press Max A/C it blows hard, just not cold. It also displayed "Max A/C" on the display, and considering all other functions on that unit work like they should, I believe its safe to assume for now that the HVAC control unit is ok.

Can I replace just the clutch on the compressor or does the whole damn thing have to come out? Whats the going price for these bad-boys.
 
First question: Do you actually see the clutch engaging and turning the compressor? Do you actually see that the clutch is not engaging the compressor? Are you CERTAIN?
 
It would'nt be if he had no freon in it at 1st. even if you added more to it, you may have not added enough. I have seen a plugged orifice tube, show that you have plety of pressure on the low side, but not near enough on the high.




Mike




EDIT..... IF you buy a new compressor, more than likely, the are gonna make you buy a new orifice tube and accumulator to validate the warranty. Just a heads up....
 
Yeah, but I'm going to ask before he goes out and buys an orifice tube, compressor with clutch, and accumulator, just to find out that his mix door arm is busted, or some other unrelated mess.

Even if his compressor is not engaging, it might just be a bad pressure or temp sensor.

More than likely, it is the clutch or compressor, but I wouldn't advise someone go out and replace it unless there is something to indicate it.
 
DUDE STOP!!!!


before you spend any money

pull the connector off the the top of the accumulator and jump the the pins with a paper clip or wire,with engine running and a/c turned on,making this connection will activate the clutch instantly if it is working.

only run it for a second or 2,dont run the compressor dry.

try this befor you go throwing clutch parts at it,

if it runs when you do this,then you either need more charge,(not likely,the system will almost always cycle on a little with 1 can)

your pressure switch could be bad(the thing you just pulled the connector from)

.

if it doesnt run,and you are sure your are jumping the connector,then while jumping the connecotr check for voltage at clutch plug on compressor,

good luck
 
Ok... heres what I just heard from a AC specialist shop guy that I just called. He told me that if I had the Gauge plugged into the High side, that 45psi was not enough to engage the clutch, he said it should engage around 80psi and while running it would be around 40-45psi.

I was at 10psi and I only added one can(one pound) to the system, where I need somewhere closer to two pounds. I'm away from home and the garage where all of my tools are, so I'll either have to wait till I go back or barrow somebody's pressure gauge and filler.

.... The mechanic I spoke with on the phone also suggested to try and force the compressor to turn on just to see whether or not that was the issue.

Thanks to all of you who chimed in!
 
94m5 said:
I don't see anywhere that I advised him to go buy new, anything...... :)
Click to expand...


I didn't say that you did. I just said that I don't want to tell him to buy anything until I know what is going on. ;)
 
Lugi20 said:
Ok... heres what I just heard from a AC specialist shop guy that I just called. He told me that if I had the Gauge plugged into the High side, that 45psi was not enough to engage the clutch, he said it should engage around 80psi and while running it would be around 40-45psi.

I was at 10psi and I only added one can(one pound) to the system, where I need somewhere closer to two pounds. I'm away from home and the garage where all of my tools are, so I'll either have to wait till I go back or barrow somebody's pressure gauge and filler.

.... The mechanic I spoke with on the phone also suggested to try and force the compressor to turn on just to see whether or not that was the issue.

Thanks to all of you who chimed in!
Click to expand...

Never fill from the high side. Fill from the low side.
 
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