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Old 06-25-2016, 09:09 PM   #1
auskip07
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Default Poor AC performance from the factory

check your ac coolant pressure, mine was hovering around 25 and had not done a good job cooling from the factory when i got the car in 2012. Filled it to around 40-45 on the refill gauge and thats all it needed.

hope this helps someone out.
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Old 06-25-2016, 09:38 PM   #2
drpoop
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Default

This is something I wouldn't be doing without a shop. Something about two hoses you need to check. A high and low pressure side or something. And those ac refill kits you get at autozone don't connect to two hoses.
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Old 06-26-2016, 06:57 AM   #3
auskip07
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Quote:
Originally Posted by drpoop View Post
This is something I wouldn't be doing without a shop. Something about two hoses you need to check. A high and low pressure side or something. And those ac refill kits you get at autozone don't connect to two hoses.
it fixed the issue and i didnt have to pay anyone to do it. So i guess im lucky..... on all 4 cars ive done it on.

Last edited by auskip07; 06-26-2016 at 07:03 AM.
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Old 06-26-2016, 08:39 AM   #4
chevytruck_83
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Default Poor ac

Some cars just have poorly designed ac systems. I purchased a 2005 Chrysler 300 new. From the day I got it it would only get cool. To get cold air you had to be doing 65 plus on the highway. On the other hand every ford I've ever owned. Be it 15 years old or 2 years old I had to turn the ac down because they get so cold. Just because a car is new or a couple years old doesn't mean they come with decent ac. As hard as it is to believe.
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Old 06-26-2016, 06:25 PM   #5
auskip07
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Quote:
Originally Posted by chevytruck_83 View Post
Some cars just have poorly designed ac systems. I purchased a 2005 Chrysler 300 new. From the day I got it it would only get cool. To get cold air you had to be doing 65 plus on the highway. On the other hand every ford I've ever owned. Be it 15 years old or 2 years old I had to turn the ac down because they get so cold. Just because a car is new or a couple years old doesn't mean they come with decent ac. As hard as it is to believe.
I dont think that is the case with the impreza
When i got my engine replaced i had a rental crosstek and that AC was very impressive. so basically the same compressor and components compelled me to look into my freon level.
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Old 06-27-2016, 02:01 PM   #6
DrummerDaveB
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My AC sucks and has since new, so I'll check that out as a possibility. I think I even have one of those refill kits sitting around somewhere.
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Old 06-27-2016, 07:18 PM   #7
flyboy1100
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Quote:
Originally Posted by auskip07 View Post
check your ac coolant pressure, mine was hovering around 25 and had not done a good job cooling from the factory when i got the car in 2012. Filled it to around 40-45 on the refill gauge and thats all it needed.

hope this helps someone out.
Check the service manual, you have now way overcharged it...maybe

more refrigerant doesn't mean better cooling, usually means worse, unless you were below factory specs.

Last edited by flyboy1100; 06-28-2016 at 12:14 AM.
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Old 06-28-2016, 12:13 AM   #8
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Old 06-28-2016, 01:21 AM   #9
Discombobulated
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Quote:
Originally Posted by auskip07 View Post
it fixed the issue and i didnt have to pay anyone to do it. So i guess im lucky..... on all 4 cars ive done it on.
Just did the same thing on my other car and it did the trick, thanks for the post

Adding some refrigerant was more cost effective than taking it to a shop to drop it off and get billed 100-200 bucks.....
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Old 06-28-2016, 12:16 PM   #10
auskip07
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Great chart, @95 degrees i was reading 25psi on the gauge i made sure to stop at 45psi knowing 50 is about as high as i wanted to realistically go.
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Old 06-28-2016, 01:07 PM   #11
flyboy1100
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Quote:
Originally Posted by auskip07 View Post
Great chart, @95 degrees i was reading 25psi on the gauge i made sure to stop at 45psi knowing 50 is about as high as i wanted to realistically go.
obviously I added the PSI numbers, but the chart is straight out of the service manual.

our cars only are spec'd for 1.05lbs of 134a. my full size pickup with probably 1/3 the interior volume is spec'd for 2.0lbs
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Old 06-28-2016, 11:03 PM   #12
Commander Keen
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Quote:
our cars only are spec'd for 1.05lbs of 134a. my full size pickup with probably 1/3 the interior volume is spec'd for 2.0lbs
A lot of that has to do with hose length.
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Old 06-28-2016, 11:23 PM   #13
flyboy1100
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Originally Posted by Commander Keen View Post
A lot of that has to do with hose length.
and i assume condensor size too?

i understand more refrigerant doesn't necessarily mean better cooling unless the system is designed to utilize more refrigerant.
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Old 06-28-2016, 11:46 PM   #14
Commander Keen
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That too. Basically the overall system volume.
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