AC help

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nnkfws333
Posts: 723
Joined: Tue Jul 23, 2002 5:29 pm
Car: 2004 Infiniti G35 and a 1989 Nissan 240SX

Post

Ok I was wondering if drjohn or Reverand could help me out.My AC has been giving my problems now. I determined that my AC wont come on. It blows out air but its not cold. My RPM's dont even go up. My condensor fan wont even come on when I turn on the AC. This morning it worked fine (AC/Fan/etc.) but then it stopped 15 min into the drive and I pulled over and I noticed the fan was off again. So I continue driving and 30 min later I turn it back on and it works fine.

Any ideas where to start? Some people mentioned to try checking voltages and stuff at the compressor and stuff but I have no clue on where and how to do that.

Thanks for your help.


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Rev_D21
Posts: 5946
Joined: Sun Jan 12, 2003 9:49 pm
Car: 1986.5 D21 LB HD 2WD V6 5Speed
1991 D21 Reg 2WD Auto
1995 D21 Reg 2WD 5Spd
1996 D21 Reg 4WD 5Spd
2012 Versa 1.6S 5-Speed
Location: Somwhere in Western NY
Contact:

Post

Well you might have a low charge that would cause the low pressure switch to kill the system. I would start by having the system recovered(see how much R12 comes out), evacuated and recharged. While doing the recharge inject an AC dye to further assist if a leak is suspected. After the recharge start the AC system and see if it is blowing cold air. A good running AC system will put out between 30-40 degrees F at the ducts on a normal day. If the system comes alive and stays alive drive it for a few days then recheck for leaks in the system using a UV light that can detect the dye. Check the evaporator drain tube for signs of dye which would indicate a leaking evaporator. That's a lot of info I know so start with the basics, recover, evacuate and recharge then go from there.

nnkfws333
Posts: 723
Joined: Tue Jul 23, 2002 5:29 pm
Car: 2004 Infiniti G35 and a 1989 Nissan 240SX

Post

Well I brought it to a shop and the guy did a pressure check and he said I Was full of freon. So he thinks maybe I have a bad condensor and drier. You think that could cause my problem reverend? The guy said at idle it wasnt as cold but when he revved it for a while it got colder so he was like maybe its the condensor and drier. ???

I just got a used condensor and new drier and hopefully that works.


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