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Old 03-15-2012, 09:40 PM   #1
accordboost
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Default wrx a/c problem???

whats up guys,
here is the problem, my 04 wrx a/c is basically just blowing air like a normal fan
(not getting cold air), i decided to check the low side pressure to see if i need refrigerant, but even when i crank the a/c all the way im not getting a single reading its always at 0.
any thoughts on if im really out or if there is a different problem?
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Old 03-15-2012, 09:52 PM   #2
atomicfire
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what are you cranking, and what is reading 0?
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Old 03-15-2012, 09:57 PM   #3
CosmoTheCat
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It sounds like you probably have a leak. You should probably have someone qualified take a look at it.
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Old 03-15-2012, 10:02 PM   #4
accordboost
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im seating the a.c on max cool and fan speed on the highest one possible.
the pressure gauge shows 0psi after i connect it to the low side port.
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Old 03-15-2012, 10:06 PM   #5
atomicfire
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If the pressure gauge shows zero, it probably means there's no refrigerant in the system. Get a black light and see if you can find a leak. You'll need to fix the leak, draw a vacuum for 2+ hours, then refill it.
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Old 03-16-2012, 03:19 AM   #6
Rally Monkey
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Quote:
Originally Posted by CosmoTheCat View Post
It sounds like you probably have a leak. You should probably have someone qualified take a look at it.
This^... and don't just dump a can of off the shelf refrigerant into the system just to have it leak out. Refrigerants are green house gases,if you care of such things.... besides being a clueless manner of diagnosis.
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Old 03-16-2012, 09:37 AM   #7
accordboost
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Turned on the a/c this morning and noticed that the a/c compressor pulley turns but the clutch I'm guessing (triangle looking thing ) does not spin at all. Could this possibly mean the compressor is done? Prob why the psi shows 0
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Old 03-16-2012, 11:08 AM   #8
wrc_tunedwrx
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When you press the ac on/off button the clutch on the compressor is supposed to move yes. So you might just have a wiring issue or the clutch has gone out in which case sometimes they can just be replaced (wouldn't recommend in car) or what you can do is find a donor car and pull the compressor. Just be sure to get everything you need to spare the extra trip. You could also just buy a new compressor but thats costly
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Old 03-16-2012, 01:30 PM   #9
X Mon
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Quote:
Originally Posted by accordboost View Post
Turned on the a/c this morning and noticed that the a/c compressor pulley turns but the clutch I'm guessing (triangle looking thing ) does not spin at all. Could this possibly mean the compressor is done? Prob why the psi shows 0
NO

Quote:
Originally Posted by wrc_tunedwrx View Post
When you press the ac on/off button the clutch on the compressor is supposed to move yes. So you might just have a wiring issue or the clutch has gone out in which case sometimes they can just be replaced (wouldn't recommend in car) or what you can do is find a donor car and pull the compressor. Just be sure to get everything you need to spare the extra trip. You could also just buy a new compressor but thats costly
NO


If the system is properly charged, there will be a residual pressure in the low side line, even with the system off. Typical low side pressures are 25-45 psi for R134a. The low side port may read HIGHER than that with the system off, depending on the style of expansion system utilized and how things equalize with the system off.

Moreover, the AC circuit has a low and high pressure cutoff switch to protect you from yourself, along with thermal protection of the compressor and related components. With a leaking line, the system is NOT going to turn on once the pressure has dropped below the minimum for the low pressure side switch.

From your questions it sounds like you have neither the tools nor the experience to do this work yourself. Take it to a pro, or find someone local who can help you out. DO NOT just randomly try to dump refrigerant into it. Technically, whom ever you resource should be 609 licensed.
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Old 03-16-2012, 10:47 PM   #10
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Quote:
Originally Posted by X Mon View Post
From your questions it sounds like you have neither the tools nor the experience to do this work yourself. Take it to a pro, or find someone local who can help you out. DO NOT just randomly try to dump refrigerant into it. Technically, whom ever you resource should be 609 licensed.

This.
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