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Unread 06-17-2009, 05:26 AM   #1
mustangbd24
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Join Date: Jan 2009
Location: lock haven, PA
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A/C Not getting cold enough, duty cycles?

i know these a/c questions are getting beat to death but it is gettting warm out... here is my issue. my ac was only getting down to about 42 deg. F after it was running for about 15 minutes on recirc. so i vac it down for about 1.5 hours and weighed the proper charge back in. it is doing a little better now, about 40 deg. f. but it takes forever for it to get there and i have to run the fan full bore the whole time. btw, my pressures were between 35-40 on the low side and around 250 on the high side. the pressures seem ok. im just wondering if i dont have another issue? perhaps the txv or the accumulator? a few more things, the outside temp was mild yesterday, about 72 deg. F. the other thing that i noticed is that the cooling/condenser fan doesnt ramp up to full speed when the ac is put on max. i was under the impression that it should. i also can stop the fan with my hand on some occasions the fan does run fast so this is confusing as to what is going on. basically what im trying to accomplish here is get my ac colder so i dont have to run the fan full bore all the time. im just afraid that when it gets into the 90's here i am going to be sweating my nads off... sorry so long and any help/suggestions would be appreciated!

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Unread 06-17-2009, 09:06 AM   #2
zvanit03ru
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1997 ZJ 
 
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Did you have this vehicle last summer? If so, was it any better? Many ZJ owners report that the AC systems in them simply aren't up to snuff when pitted against the hottest climates, like here in the steamy jungles of South Florida. I think the evaporators are too small, and prone to clogging.. I've had mine for three summers now (this is the fourth), and it has never been able to cool the entire cabin/cargo area. Just too much space.
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Unread 06-17-2009, 09:12 AM   #3
iluvtruenos
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duct tape a midget under there with a mini sledge......
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Unread 06-17-2009, 10:28 AM   #4
Max78
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My AC didn’t seem to work to well. I have a slow leak and not looking forward to fixing it. But I tinted all my windows with a Nano-20 Tint, and that made a BIG difference, But it’s not cheap.
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Unread 06-17-2009, 11:19 AM   #5
mustangbd24
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Quote:
Originally Posted by zvanit03ru View Post
Did you have this vehicle last summer? If so, was it any better? Many ZJ owners report that the AC systems in them simply aren't up to snuff when pitted against the hottest climates, like here in the steamy jungles of South Florida. I think the evaporators are too small, and prone to clogging.. I've had mine for three summers now (this is the fourth), and it has never been able to cool the entire cabin/cargo area. Just too much space.
no i didnt have it last summer so i have nothing else to compare it to except other vehicles. i would consider anything in the mid to upper 30's a good discharge temp when the weather is in the 70's. really anoying that an 04 has worse ac than my 88' t bird! there has to be a solution to this. i wonder if the fan speed has something to do with it???
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Unread 06-22-2009, 02:29 PM   #6
zvanit03ru
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Your T-Bird used R12 Freon; the GC uses R134a refrigerant. That's part of the difference right there; the newer refrigerant, all other factors being equal, just doesn't have the chill Freon did... I noticed a big difference when I converted an older Camry to R134a. Wished I hadn't, but Freon is just too hard to come by anymore..
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Unread 06-22-2009, 03:20 PM   #7
4Slow9erHybrid
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Quote:
Originally Posted by mustangbd24 View Post
no i didnt have it last summer so i have nothing else to compare it to except other vehicles. i would consider anything in the mid to upper 30's a good discharge temp when the weather is in the 70's. really anoying that an 04 has worse ac than my 88' t bird! there has to be a solution to this. i wonder if the fan speed has something to do with it???
How do you guys measure the discharge temperature? Do you need a special thermometer? The interior color makes a big difference. Mine is charcoal and gets hot very easily.
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