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Old 04-18-2015, 11:50 AM   #1
Scooby Newbie
Member#: 391453
Join Date: May 2014
Default A/C is blowing hot air..

I drive a 2005 wrx thats "stage 2" lol
So I'm no master mechanic but I've done a fair amount of work myself. I've never worked with any air conditioning systems before so I'm in desperate need of some tips here.
Its getting warm in NY so i tried to use my A/C the unit that is ran by the accessory belt (condenser i believe?) was not engaging. i did some research and saw that my car has a failsafe in which it will not engage if there is not enough r134 in the system. I bought the a/c pro thing from walmart and added some refrigerant and sure enough the condenser kicked in. The cheap ass gauge wasn't working properly or my car was loosing refrigerant as fast as i could put it in, the gauge was reading dead zero. I stopped adding refrigerant in fear of over filling it. Its been a few days now and the condenser will still engage but hot air just comes out, not a hint of cold air at all. i haven't really seen anyways to test the system to diagnose a problem. I have seen people replace the expansion valve and some o-rings. Obviously it leaked out but how can i find where/how? Thanks for reading my novel and would greatly appreciate some help!
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Old 04-18-2015, 12:37 PM   #2
Trust no one
Member#: 11170
Join Date: Oct 2001
Chapter/Region: Tri-State
Location: NYC
02 WRX
15 WRX/05 GTO


Do yourself a favor here since you obviously know nothing about proper AC repair- take it to a shop that does know what they are doing. They will diagnose and fix the leak and anything else that may be wrong, then evacuate the system and charge it with the correct amount of refrigerant.
Yes this will cost a lot more than that DIY can that didn't fix it, but it will be done right.
Mulder is offline   Reply With Quote
Old 04-18-2015, 07:52 PM   #3
Scooby Newbie
Member#: 372346
Join Date: Oct 2013
2008 Impreza WRX
Obsidian Black Metallic


Take it to an A/C shop and have them check it out. Mine had the same issue last summer. Blew ice cold one day, 12 hours later it was like A/C didn't exist.

My mechanic recharged the system, but it wasn't charging up. He said there was a leak. But after having the A/C shop try to find the leak, turns out it was just low on R134. It was only a $90 diagnosis fee, way cheaper and efficient than DIYing the whole process. They charged it up and it's been working fine since, but the compressor clutch is grinding on start ups now.
084eatWRX is offline   Reply With Quote
Old 04-18-2015, 10:21 PM   #4
Scooby Specialist
Member#: 200545
Join Date: Jan 2009
Chapter/Region: SWIC
Location: Phoenix, AZ
2002 Subaru WRX PSM
2015 Subaru WRX ISM


Maybe try your regional forum for advice on a trusted local shop. You will want to take it in to a shop with the correct tools to do the job right.
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