What temp should my ac be blowing on max? - Mustang Evolution

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Old 08-13-2014, 04:23 PM   #1
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What temp should my ac be blowing on max?

So I just got my 2012 back from the dealer, they replaced the ac compressor. But yet it does not feel as cool as it used to. I have it on max and the cabin air is cycling. It feels fresh at best but not cold, I know it is super hot here in Texas (100+ the last few days) but it does not feel that great. I am buying a thermometer today to get readings myself, does anyone know what temp should be blowing at max?? I plan on checking the temp with the car in the garage and in the sun and present it to my service advisor. Any info would help.

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Old 08-13-2014, 05:33 PM   #2
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I just tested it and the coldest the air out of the vent gets is 60 degrees. Is this normal? I expected and felt cooler before. Mind you I am parked in the shade and also it took a while for it to get to 60 degrees. Any info would be appreciated.

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Old 08-13-2014, 05:51 PM   #3
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Try checking it with you rpms around 2000 with you windows up hood closed and air turned all the way up

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Old 08-13-2014, 06:06 PM   #4
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check the gas.


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---------- Post added at 11:06 PM ---------- Previous post was at 11:06 PM ----------

also 60 degrees out the vent is very cold actually


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Old 08-13-2014, 07:36 PM   #5
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With the car closed up and rpms up around 2000 it should be blowing like 30 or below the last car I charged the a/c on was blowing 18 out

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Old 08-13-2014, 08:17 PM   #6
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Nope even under the carport no lower than 63

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Old 08-13-2014, 08:47 PM   #7
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I'll go measure my temps tomorrow and post them up so you have a reference - mine works great, I've never had to do anything with it thus far so you could probably consider it a stock benchmark.
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Old 08-14-2014, 12:45 AM   #8
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60 seems cold enough...what color is your car? Darker cars take longer to cool off due to greater heat soak. I saw the episode on Mythbusters....hahaha : )

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Old 08-14-2014, 01:21 AM   #9
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That seems really warm. Mines Black on Black tinted and a windshield cover. I live in Texas it takes a while to cool off but by the time I'm at the end if my drive way it's blowing super cold. I don't know the exact temp but definitely not 60. I'd have it rechecked.
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Old 08-14-2014, 05:39 AM   #10
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What are you using to measure the temp and where are you measuring it coming fron

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Old 08-14-2014, 05:53 AM   #11
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If you're going to test the A/C operation in your garage or driveway, place a fan in front of the car, close to the nose and put it on high; see if the A/C temps drop. If this helps, it could indicate that either the e-fan is not drawing enough air through the front, you have some debris logged in front of the radiator/condensor, or your e-fan is not working at all (although you'd see engine temps rising too).

If your dealer is not working with you to your satisfaction, you can always take it to an automotive A/C shop; many offer free A/C checkups. This way you can get a second opinion as to if there is a problem.

We are having warm summers in Florida as well; not 100 degree temps (but it feels like it), and the A/C in my 2011 Mustang cools great.
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Old 08-14-2014, 11:55 AM   #12
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OK, as promised:

I did this after driving the car around on errands this morning. She's black on black, its 71 degrees here in Chicago today, and she was at operating temps when I measured it.

Parked in direct sunlight, revs kept at 1500 for 10mins, A/C on 'max ac' with fans turned all the way up. Thermometer in the center blowers, above the radio. Yes, I was freezing my *** off while doing this lol.

After exactly 10 minutes (I used a timer) the thermometer read 48 degrees. I drove around with the everything exactly the same - 49 degrees at lights, 47 degrees while on the road doing ~45mph.

Hope this helps,

-Ryan

---edit---
I used one of my medical thermometers. I'm a nurse, and this one is accurate to the hundredths (0.00) if I need it to be.
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Old 08-14-2014, 02:05 PM   #13
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Oh wow that is good information. Thanks for getting that. I am taking it back to have the levels checked. It takes 20 minutes for the air to get to 60 degrees while driving in 93 degree temperatures. There has got to be something wrong with it

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Old 08-14-2014, 05:43 PM   #14
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I am here at the dealer, turns out the system.was 10 ounces low!!!. I dont think they properly charged it when they replaced the compressor yesterday. Luckily it is getting fixed and dye added in case it is leaking.

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