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08-11-2009, 08:44 PM | #1 |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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A/C question
My A/C was blowing super cold yesterday, today I turned it on and nothing but hot air.
I can't imagine how all my freon would leak out overnight and I didn't hear the A/C compressor kick on...... Any suggestions?
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08-11-2009, 09:00 PM | #2 |
Scooby Newbie
Member#: 146280
Join Date: Apr 2007
Chapter/Region:
NWIC
Location: Where's my gov'ment check?
Vehicle:2004 39'WRX - SOLD 2005 Duramax Silverado |
You can get a pressure gauge and check the pressure. No pressure, no cold air, no compressure respone.
Do you have an aftermarket TMIC? I've posted this already once today, but bigger TMIC's can rub a hole in your IC line and the gas loss will be quite quick. |
08-11-2009, 11:57 PM | #3 | |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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Quote:
I am running an STI TMIC this seems like really solid advice. If it did rub a hole will i be able to repair the hole with brazing or will I need to replace the hose? |
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08-12-2009, 01:14 AM | #4 |
Scooby Specialist
Member#: 125950
Join Date: Sep 2006
Location: West Palm Beach, FL
Vehicle:2010 BMW 135i/05 Sti 7.3 F350/06 Audi A4 |
Easier to just replace the hose.. First thing is to check the pressure on the low side, should be around 60 or more psi off. If that checks ok then check the fuses, if the fuses are ok make sure the relay is clicking, make sure the compressor didn't lock up, and you can check the high and low pressure switches.. If the compressor is turning and still blowing hot air then the blend door is messed up
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08-12-2009, 01:25 AM | #5 | |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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Quote:
Very good advice, I went for a drive earlier and tried it again and just to reiterate the problem, when I turn on the AC I do not hear the compressor turning on. You stated make sure "the relay is clicking" Can you please explain a little more about this. Does the relay go from the switch in the cabin to the compressor? Or is the relay a separate component which delivers power to the compressor? Thanks again you guys rock~! |
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08-12-2009, 02:34 PM | #6 | |
Scooby Newbie
Member#: 146280
Join Date: Apr 2007
Chapter/Region:
NWIC
Location: Where's my gov'ment check?
Vehicle:2004 39'WRX - SOLD 2005 Duramax Silverado |
Quote:
Start with checking the pressure first and we can go from there. |
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08-12-2009, 04:05 PM | #7 |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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ok, so here is the update:
The relay is good (I switched it with the horn one to test it out.) There is no pressure on the High side, I didn't need a gauge I simply pressed in the valve and got a tiny psst for a millisecond and then nothing. This was with the motor off I then started the car turned on the A/C and waited a few minutes Then checked the High side again and still no pressure. I never heard the compressor turn on I am guessing the Low pressure switch was preventing it from turning on. -What do you guys suggest I do next?? recharge the system? perform some sort of leak test? |
08-12-2009, 04:44 PM | #8 |
Scooby Newbie
Member#: 141028
Join Date: Feb 2007
Location: Atlanta, GA
Vehicle:2002 WRX Wagon WRB |
The compressor will not turn on if you have low freon. Find you leak , fix, evacuate & recharge - presto - cool air.
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08-12-2009, 04:52 PM | #9 |
Scooby Newbie
Member#: 146280
Join Date: Apr 2007
Chapter/Region:
NWIC
Location: Where's my gov'ment check?
Vehicle:2004 39'WRX - SOLD 2005 Duramax Silverado |
You mentioned that you had that STI TMIC. Take a look on the passenger side of the firewall and see if the TMIC is making contact with the low pressure side of the AC line. Check for rubbing and leaks there first. After that, you're on your own. They make kits that you can find at almost any autoparts store that will help you find the leak.
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08-12-2009, 04:52 PM | #10 | |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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Quote:
http://www.autozone.com/autozone/cat...randName=Quest I used to work for an A/C company and we had a Sniffer device that could detect a leak. To bad I don't work there anymore... Is the UV dyed freon the most common way to find a leak? Or do people charge their systems with nitrogen and spray soap on their connections? I am leaning more towards the UV dyed r134 this way I might be able to locate a loose connection and be able to fix it then charge it without having to get a vacuum pump to evacuate the system. Suggestions? |
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08-12-2009, 05:03 PM | #11 | |
Scooby Guru
Member#: 487
Join Date: Nov 1999
Chapter/Region:
TXIC
Location: Houston TX
Vehicle:1998 /2005 STunIcorn Acadia Green USDM 22b |
Quote:
well i would take to mechanic and ask to perform a leak test(that is all you authorize, here is why.) to perform leak test, the mech will have to re-charge syst with freon/oil/ultraviolet dye. they will find the leak with an ultraviolet hand held lamp. -now tell them to recover the refrigerant(that you just paid for) -fix the leaking hose/part/compressor -take back and recharge the ac system shouldnt be more than $120 for leak test and then since you already paid for the freon/oil once you fix the leak only around $60 to recharge systm and you are done. |
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08-12-2009, 05:10 PM | #12 | |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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Quote:
Hmm, I was looking for more of a do it yourself fix. I am guessing I will just add the UV dyed freon and buy the UV light. and see if I can find it. |
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08-12-2009, 05:38 PM | #13 | |
Scooby Guru
Member#: 487
Join Date: Nov 1999
Chapter/Region:
TXIC
Location: Houston TX
Vehicle:1998 /2005 STunIcorn Acadia Green USDM 22b |
Quote:
certainly can do yourself just need one of those $100 ac guages(the one with 3 guage heads on it) and make sure you do not over charge the syst with dye/oil/freon combo also if you do have a leak, you will have to buy freon/oil twice. bc you cannot recover the freon without one of those $1k ac charge machine that shops use. |
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08-12-2009, 07:26 PM | #14 | |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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Quote:
You win! You were dead on correct, after some more inspection I noticed that the low pressure line was in fact very close to the TMIC when I moved the line back I saw the indentation in the line as well as picked up some oily residue. BINGO found the leak! Now part two to this thread. HOW TO FIX IT? I am comfortable brazing and think I might as well give it a shot before I order the $70 hose from my local Subaru dealer. Anyone see any possible negative outcome to brazing the leak? I plan on using a small torch and some silver solder and flux. Since you all did a great job on your write ups I figured I would include some photos for you viewing pleasure. Hopefully they will help in the future if someone else experiences this problem with an aftermarket TMIC (I am only running an STI one) Last edited by sdnativesurfer; 08-12-2009 at 10:20 PM. |
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08-12-2009, 08:31 PM | #15 |
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you cant braze that.
Do yourself a favor buy the STi line, it will clear the intercooler. |
08-12-2009, 08:36 PM | #16 |
Scooby Newbie
Member#: 146280
Join Date: Apr 2007
Chapter/Region:
NWIC
Location: Where's my gov'ment check?
Vehicle:2004 39'WRX - SOLD 2005 Duramax Silverado |
^ What he said. If you braze it, charge it and it fails, you're out 30 dollars of r-134. I tried to patch mine using JB weld thinking to myself, that crap will hold anything. Yeah, it worked for a day. I picked my STI line up from Prodrivenauto, who is a vender on this site. It was $100 paypaled, which was a lot less than the $170 that Carter Subaru in North Seattle wanted.
On a side note, I should really think about reading my posts before I click submit. I apparently can't spell for *****. |
08-12-2009, 10:17 PM | #17 | |
Scooby Newbie
Member#: 210799
Join Date: May 2009
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Quote:
Here are a few more photos---- Last edited by sdnativesurfer; 08-12-2009 at 10:24 PM. |
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08-12-2009, 11:14 PM | #18 |
Scooby Newbie
Member#: 146280
Join Date: Apr 2007
Chapter/Region:
NWIC
Location: Where's my gov'ment check?
Vehicle:2004 39'WRX - SOLD 2005 Duramax Silverado |
Well if you haven't recharged yet, you haven't wasted your $30. I used some sort of two part epoxy and it didn't work. I really would eat the difference and just get a good line.
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