Welcome to the North American Subaru Impreza Owners Club Thursday July 31, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 04-04-2010, 06:54 PM   #1
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default A/C not blowing cold

It recently got a little warmer here and when I turned on the AC I noticed it wasn't blowing cold at all. When I looked at the compressor, it wasn't spinning either so I put in a can of R134a. It was cold for about 10 minutes and it just got warm again. The compressor was still spinning but warm air just came out. I turned the car off and came back later on and turned the A/C back on and it was cold again for 5-10 minutes, sometimes warm air will just come out without any cold at all for any time. Is my compressor going bad?
* Registered users of the site do not see these ads.
doodie is offline   Reply With Quote
Old 04-04-2010, 07:06 PM   #2
CSwrx22
Scooby Specialist
 
Member#: 216675
Join Date: Jul 2009
Chapter/Region: Tri-State
Location: NJ
Vehicle:
07 Impreza WRX
UGM

Default

do you have it on recirculate? i know sometimes if you have it bring in fresh air it does not get as cold. also you might have a ac line leak somewhere, or just need to get the system drained and refilled.
CSwrx22 is offline   Reply With Quote
Old 04-05-2010, 09:28 AM   #3
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

Thanks CS,

no one has another clue besides a flush?
doodie is offline   Reply With Quote
Old 04-05-2010, 11:39 AM   #4
djerickd
Scooby Guru
 
Member#: 3782
Join Date: Jan 2001
Chapter/Region: South East
Location: Tampa B*tch!
Vehicle:
02 WRX WFC#040
Clean on 19's

Default

leaky seals.
djerickd is offline   Reply With Quote
Old 04-05-2010, 11:52 AM   #5
avk
Scooby Specialist
 
Member#: 17252
Join Date: Apr 2002
Chapter/Region: Tri-State
Location: NJ
Vehicle:
'06 WX8
59E

Default

A set of gauges is necessary to come up with a meaningful diagnosis.
For example, it would help to know how the readings change once it stops blowing cold.
avk is offline   Reply With Quote
Old 04-05-2010, 05:11 PM   #6
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

I don't have any guages to plug in to see whats wrong. All that happens is that when the car is first turned on, it will be ice cold for 5 minutes. Then it would go warm totally.
doodie is offline   Reply With Quote
Old 04-06-2010, 04:02 AM   #7
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

If this is an intermittent problem it could be the expansion valve sticking. You should not keep attempting to run the ac until you get this sorted out cuz if that is the problem the pressure is going sky high in the system and it can ruin the compressor (I actually had the discharge hose explode before from this) You need a set of manifold gauges and you need to know how to read them to determine what the problem is. Dont keep dumping refrigerant in there assuming that you have a leak cuz if it has a full charge you are just gonna make matters worse. If it was low on refrigerant it would blow warm air all the time and if it was low enough the compressor wouldn't turn on at all. Do a search for expansion valve and read up on it.
Rickyh is offline   Reply With Quote
Old 04-06-2010, 12:15 PM   #8
XanRules
NASIOC Supporter
 
Member#: 157348
Join Date: Aug 2007
Chapter/Region: NWIC
Location: Rustletech Headquarters
Vehicle:
1996 JNCO Jorts
Stonewashed Denim

Default

call the amberlamps, sounds like you're leaking.
XanRules is offline   Reply With Quote
Old 04-06-2010, 08:42 PM   #9
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

Quote:
Originally Posted by Rickyh View Post
If this is an intermittent problem it could be the expansion valve sticking. You should not keep attempting to run the ac until you get this sorted out cuz if that is the problem the pressure is going sky high in the system and it can ruin the compressor (I actually had the discharge hose explode before from this) You need a set of manifold gauges and you need to know how to read them to determine what the problem is. Dont keep dumping refrigerant in there assuming that you have a leak cuz if it has a full charge you are just gonna make matters worse. If it was low on refrigerant it would blow warm air all the time and if it was low enough the compressor wouldn't turn on at all. Do a search for expansion valve and read up on it.
K, thanks for all the info.

Quote:
Originally Posted by XanRules View Post
call the amberlamps, sounds like you're leaking.
what's the amberlamps?

Also, a little update... I noticed that everytime I turn off and turn the car back on, the AC would be ice cold again. 5-10 minutes later, it gets warm. Turn off the car, then back on and it's cold again.
doodie is offline   Reply With Quote
Old 04-06-2010, 08:51 PM   #10
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

If it was low on refrigerant it would be warm all the time. It is not leaking.
Rickyh is offline   Reply With Quote
Old 04-06-2010, 08:54 PM   #11
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

Quote:
Originally Posted by Rickyh View Post
If it was low on refrigerant it would be warm all the time. It is not leaking.
That's what I was thinking too. I'm thinking it's more of an electrical issue. Think it might be the relay?
doodie is offline   Reply With Quote
Old 04-06-2010, 09:58 PM   #12
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

No. if the compressor is turning and it is intermittently blowing warm and cold air it is not electrical. If it was electrical the compressor would not turn on. A sticking expansion valve will cause the symptoms you are describing. Next time you turn it on, when it starts blowing warm air check and see if the compressor is turning. If the compressor is turning and it is blowing warm air, there is either a blockage (like a stuck expansion valve) or another thing I have seen is the radiator fans not turning on. I have seen a car build up really elevated high side pressure because the fans were not pulling any air through the condenser while the compressor was on. This is probably not your problem cuz the car would also be overheating if the fans were not on. There are a couple other possibilities such as the blend door being stuck but it would also blow hot air all the time
Rickyh is offline   Reply With Quote
Old 04-06-2010, 10:21 PM   #13
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

Quote:
Originally Posted by Rickyh View Post
No. if the compressor is turning and it is intermittently blowing warm and cold air it is not electrical. If it was electrical the compressor would not turn on. A sticking expansion valve will cause the symptoms you are describing. Next time you turn it on, when it starts blowing warm air check and see if the compressor is turning. If the compressor is turning and it is blowing warm air, there is either a blockage (like a stuck expansion valve) or another thing I have seen is the radiator fans not turning on. I have seen a car build up really elevated high side pressure because the fans were not pulling any air through the condenser while the compressor was on. This is probably not your problem cuz the car would also be overheating if the fans were not on. There are a couple other possibilities such as the blend door being stuck but it would also blow hot air all the time
Thanks a lot Ricky, you've been a lot of help. I've done some searches on the expansion valve and it really does seem like that's the culprit. I'm going to be ordering a new one to put in sometime next week I think. Actually found it on ebay for $48+5 shipping. Cheapest everywhere.

thanks again.
doodie is offline   Reply With Quote
Old 04-06-2010, 10:38 PM   #14
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

I would be surprised if that is not your problem. It is easy enough to swap out. I have never seen them go that cheap. 48 bucks is a steal if it is the right one. Remember to get some new 0 rings. You will need two of them and they are two different sizes. you can get a pack of multiple sized o rings from autozone for about ten bucks. They will also loan a vacuum pump and manifold gauges to you so that you can vacuum it down and charge it back up.
Rickyh is offline   Reply With Quote
Old 04-06-2010, 10:57 PM   #15
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

Yup, actually did a search on Autozone and Pepboys, they have it for even cheaper. Brand new expansion valves for $22
doodie is offline   Reply With Quote
Old 04-07-2010, 05:39 PM   #16
joec wrx
Scooby Newbie
 
Member#: 112359
Join Date: Apr 2006
Chapter/Region: BAIC
Location: Central Valley,CA
Default

Which expansion valve did you go with? Kragen or Autozone? I'm having the same problem as you and I think it's worth trying out. Let us know how it goes. Thanks
joec wrx is offline   Reply With Quote
Old 04-13-2010, 10:05 PM   #17
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

update: ordered one from autozone, came out to be $30 with shipping. I'll be putting it in tomorrow or the day after depending on sunlight when i get home from work. It looks exactly like the pictures I've seen posted online.
doodie is offline   Reply With Quote
Old 04-13-2010, 10:17 PM   #18
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

Don't forget the o rings.
Rickyh is offline   Reply With Quote
Old 04-14-2010, 09:09 PM   #19
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

Yeah, the one from autozone came with o rings so i didn't buy any. I got around to change it out today and noticed that the o rings that came with the valve were thinner than the ones on the car. I went around to a local auto store, autozone and strauss and couldn't find any o rings at all. So I inspected the ones that were on the car and cleaned it off. None of the o rings looked ripped so I threw it back on.

Haven't vaccumed the system and refilled it yet since it took me a while because it's in such an awkward position. I'll follow up tomorrow after I vaccume and refill.
doodie is offline   Reply With Quote
Old 04-14-2010, 11:40 PM   #20
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

Barring any leaks, all should be well. If it won't hold a vacuum it is probably leaking by those o rings. If they looked like they were in good shape you might be ok with it.
Rickyh is offline   Reply With Quote
Old 04-15-2010, 10:25 PM   #21
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

quick update. Had the A/C system vaccumed today and refilled it with 2.25 bottles of r134a. It looks like it did the trick, everything seems to be holding up good, might need another 1/2 can or so of refridgerant. Thanks Ricky.
doodie is offline   Reply With Quote
Old 04-17-2010, 03:05 PM   #22
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

That seems like a lot of refrigerant. I believe it is only supposed to take 16-19 ounces....maybe my memory is bad though.
Rickyh is offline   Reply With Quote
Old 04-17-2010, 03:09 PM   #23
Rickyh
Scooby Specialist
 
Member#: 40453
Join Date: Jul 2003
Chapter/Region: South East
Location: Metairie, Louisiana
Default

yep. just went outside and checked. It only needs 16-19 ounces. Bout a can and a half. I guess you have 12 ounce cans. Too much of this stuff won't make it cool better. If you look right in front of the radiator closer to the drivers side there is a sticker that tells you how much r134 to fill it with.
Rickyh is offline   Reply With Quote
Old 04-17-2010, 10:42 PM   #24
doodie
Scooby Newbie
 
Member#: 14578
Join Date: Jan 2002
Location: brooklyn
Vehicle:
2002 WRX Wagon
PSM

Default

okay cool, when I asked the mechanic they told me about 3 cans... I'll go release some of it.
doodie is offline   Reply With Quote
Old 04-22-2010, 02:16 PM   #25
Dramabomb
Scooby Specialist
 
Member#: 141781
Join Date: Feb 2007
Chapter/Region: Tri-State
Location: Southern NJ
Vehicle:
2012 Dickstorm

Default

I have this same issue. How hard is the expansion valve to replace? Are there directions anywhere?
Dramabomb is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
A/C Not Blowing Cold? d0ugch0i Car Care & Detailing 8 04-15-2010 11:09 PM
AC not blowing cold air b0red@werk Service & Maintenance 6 07-02-2009 05:23 PM
AC filled w/ freon...blows hot, refilled...blows cold What gives? dingo dave Service & Maintenance 3 04-26-2009 08:06 PM
Why is my a/c not blowing ice cold ??? boostedsti06 Factory 2.5L Turbo Powertrain 13 03-17-2008 05:39 PM
A/C hissing not blowing cold air ryanpietro Factory 2.5L Turbo Powertrain 3 08-28-2006 02:33 PM


All times are GMT -4. The time now is 05:27 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.