Not very cold A/C - Dakota Durango Forum
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post #1 of 15 Old 07-31-2006, 09:52 PM Thread Starter
Steve88XJ
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Not very cold A/C

Hi all-

I have a '99 Durango 4x4 w/ the 5.2L. I've been less than satisfied with how cold my a/c blows. I bought it at CARMAX when it was still cool outside and I didn't need a/c. When it got warm out and I started to use it, it wasn't cold at all. I bought a refill tool at the Auto Parts store and some R134a and charged it up. It had very little pressure, but now it's got just under 40 psi.

Also, my heater core leaks, so I bypassed it by connecting the two hoses that go to the firewall together. I noticed my a/c get a LITTLE cooler but it's still not good enough. If I have all three vents pointing at me with the far right one closed then I'm not sweating my asss off, but if there is more than one person in the vehicle and I have to give the passenger that right center vent, then it really sucks.

Anyways, my question now, is where do I go next? My rear a/c blows kinda cold but not really. What is the pressure that the a/c system should be reading at when running and engaged?

Thanks much, it's steadily over 100 degrees here and I'm getting desperate!

'99 Durango 5.2L 4x4 on 31s
'88 Cherokee 4.6L 4x4 on 33s (bored, stroked, etc., etc...)
'82 Honda VF750S

Last edited by Steve88XJ; 07-31-2006 at 09:58 PM.
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post #2 of 15 Old 08-01-2006, 12:17 AM
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i say find a buddy that works in a shop that can work and recharge the system, also look into gettin some dark tint, that makes some difference too.
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post #3 of 15 Old 08-01-2006, 12:46 AM
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Are you running the A/C on recirculate?It will run cooler there and you don't get all the funk from outside.

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post #4 of 15 Old 08-01-2006, 02:41 AM
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Durango's have a recirculate button?

SOLD 02/2009 : 2000 Dodge Durango R/T (I miss the truck big time, will have to buy another one eventually)

Currently: 2005 Chrysler 300C HEMI 5.7L Black
2009 Honda CBR600RR Black/Silver
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post #5 of 15 Old 08-01-2006, 04:31 AM
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Should have. Where you select where the air comes from. Upper vents,Floor, Both etc. Should be the sideways "U" shape with an arrow on it. On my Dakota if I turn A/C on thru the upper vents it isn't real cold. Thru recirculate it will blow real cold even at idle.

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post #6 of 15 Old 08-01-2006, 04:58 AM
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I agree with addicted take it to a shop, those do it yourself kits are a waste of money. also, recirculating is the same as turning on max air.


Current setup: 3.9L ,K/N 9" round air filter, removed clutch fan, Hooker Aerochamber, 8.5mm Taylor plug wires, ss mirrors, fiberglass hard cover, Upper & Lower grill inserts, clear corners RCC Member #22
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post #7 of 15 Old 08-01-2006, 06:07 PM Thread Starter
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what does the a/c shop do that I do differently? do they charge it to higher than 40 psi? do they recirc the freon and replace it? is it that they ensure that the freon to oil ratio is correct?

I've heard that before... take it to a shop... don't use the do-it-yourself... but I've used the do-it-yourself on other vehicles and had good results.

If I have no other option then I'll do it, I'd just like to know what they'd do differently.

'99 Durango 5.2L 4x4 on 31s
'88 Cherokee 4.6L 4x4 on 33s (bored, stroked, etc., etc...)
'82 Honda VF750S
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post #8 of 15 Old 08-01-2006, 08:22 PM
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im not sayin take it to any shop, like i said find a buddy that does it, theres less chance he wont tell you some BS and could give ya some free advice. do it yourself kit arent bad either.
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post #9 of 15 Old 08-02-2006, 01:14 AM Thread Starter
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i understand...

...unfortunately I haven't been in the area long so I have no buddies here.

Maybe next time I go back home to CA I'll have it looked at my a buddy there.

I guess I was hoping to find someone here who knows AC systems well enough to tell me what to look for, you know, what a tech would look for.

'99 Durango 5.2L 4x4 on 31s
'88 Cherokee 4.6L 4x4 on 33s (bored, stroked, etc., etc...)
'82 Honda VF750S
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post #10 of 15 Old 08-02-2006, 07:50 AM
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Do you know what the high side is reading? It is a possibility you overpressurized the system, its the high side where you get the most accurate reading on what charge is on the system. Too much refridgerant is not a good thing. Have you remeasured to see if the charge is holding over time (not leaking)? Does your compressor make audible clicks when the ac is turned on? Is your evaporator defective?
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post #11 of 15 Old 08-02-2006, 07:53 AM
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By the way, unless you -never- get cold weather, reconnect the heater core to the coolant lines. The coolant has conditioners that keep the interior of the heater core and other parts from rusting, which will prevent leaks.
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post #12 of 15 Old 08-02-2006, 06:11 PM Thread Starter
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Quote:
Originally Posted by phatfire6
Do you know what the high side is reading? It is a possibility you overpressurized the system, its the high side where you get the most accurate reading on what charge is on the system. Too much refridgerant is not a good thing. Have you remeasured to see if the charge is holding over time (not leaking)? Does your compressor make audible clicks when the ac is turned on? Is your evaporator defective?
Well, I'm guessing that port right on top of the compressor is the service port (low side), and that's all I've used. It's right under 40 psi. Where is the high side port? What should it be reading at?

I don't think I have too much refridgerant, but I'd really like to be able to test it to make sure. I don't recall if my compressor makes an audible click or not because usually I'm listening to the stereo when driving. I'm sure it's turning on though.

How do I test if my evaporator is defective?

Quote:
Originally Posted by phatfire6
By the way, unless you -never- get cold weather, reconnect the heater core to the coolant lines. The coolant has conditioners that keep the interior of the heater core and other parts from rusting, which will prevent leaks.
I disconnected the heater core because it was leaking coolant on my passenger floorboard, it's going to get replaced anyways. I have a few months before I have to worry about cold weather.

'99 Durango 5.2L 4x4 on 31s
'88 Cherokee 4.6L 4x4 on 33s (bored, stroked, etc., etc...)
'82 Honda VF750S
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post #13 of 15 Old 05-03-2012, 04:29 PM
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A/C not blowing cold air

Hello all.

I have a 05 Durango and when I turn on the air conditioner and have all the settings on correctly, it will not blow cold air. I have recharged it with one can of freon. During that the air did get cooler but not as cold as it did before and after one or two uses it went back to warm air. With the temps already near the 90s I would love to have it working again. Any suggestions???

Thanks!
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post #14 of 15 Old 05-03-2012, 07:07 PM
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Quote:
Originally Posted by kms0425 View Post
Hello all.

I have a 05 Durango and when I turn on the air conditioner and have all the settings on correctly, it will not blow cold air. I have recharged it with one can of freon. During that the air did get cooler but not as cold as it did before and after one or two uses it went back to warm air. With the temps already near the 90s I would love to have it working again. Any suggestions???

Thanks!
Holy thread revival, batman!

Welcome to the board!

You have a leak in your A/C system. You can sometimesfind the location by looking at the lines, and looking for an area that has a lot of dust and grease accumulation.

Your best bet is to find the leak, either by visual inspection, or UV dye, and repair as required.

The A/C system has a lot of fittings, so while you are working on it, I would also suggest that you consider replacing all the other o-rings while the system is open. The o-ring kit is ~$10 from most places.
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post #15 of 15 Old 05-04-2012, 12:17 AM
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You need to get a set of guages on it to see what the presures are. I say this to everyone that has A/C issues - DON'T add anything else to it until you get it checked out.

Money is always a factor, but take it to a reputable shop, pay them the hour for inspeciton, then make a decision on what you want to do with it. Charging a system without a proper set of guages is a waste of time, and will cost you more in the long run.

A lot of people just add refrigerant to "top it up" at home. Do yourself a favour - at the bare minimum find a local shop (or a buddy) that will put the guages on it and diagnose it for you. Then at least you know where you stand.
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