Ok, this is nuts! = A/C won't turn on - Kia Forum

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post #1 of 20 (permalink) Old 03-12-2019, 10:49 PM Thread Starter
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Ok, this is nuts! = A/C won't turn on

So I have no A/C on my '14 Sorento. The 7.5 A/CON fuse in the inside fuse box is fine. The A/CON fuse in the engine compartment fuse box is missing?? I did a double take looking at the diagram to make sure I was really seeing what I thought I was seeing. Sure enough, the fuse is not there. I mean, did someone steal it? I had A/C all last summer and haven't taken the fuse out so........??? Anyway...here's where it gets real crazy. I took a spare 10A fuse and put it in and still no A/C! What the heck is going on here? Could my Sorento just not have an A/C fuse in the engine compartment fuse box, and other models do and that's where it would be if it was needed? Maybe I have an issue other than a fuse? Comments on this crazy situation much appreciated! It blew good and cold last summer, so I really don't think it's a low of refrigerant issue, but I guess you never say never.


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post #2 of 20 (permalink) Old 03-12-2019, 11:23 PM
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If refrigerant pressure is too low AC won't turn on, check refrigerant.
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post #3 of 20 (permalink) Old 03-13-2019, 08:31 AM
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My 2015LX does have the 10A fuse...I have no idea if it is functional or there just as a spare...
.WHat is the temperature in Tenessee at this time ? Of course if you want A/C, I guess you need it but around and below 32F , it will not turn on because at this temperature, refrigerant pressure is too low..just as if you were missing refrigerant.
I see today temp in your place is around 60F...so it should work...just make sure the low pressure sensor is connected....correction..this one uses a temperature sensor located at the evaporator (unreacheable) ....and a high pressure sensor on the high pressure side (location unknown). THere is also a cabin temperature sensor(with auto HVAC). ANy failure of any one of these may impair A/C operation...by the way, IS your A/C manual or auto ? LX.like mine..then..is probably manual.

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post #4 of 20 (permalink) Old 03-14-2019, 08:59 AM Thread Starter
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wouldn't have thought it in a million years, but it was low on refrigerant, the question is where did it go? it blew super cold last year, on a 90 degree day you were cutting it back after about 10 mins. I even commented to my wife I didn't think I had ever felt such a cold A/C.
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post #5 of 20 (permalink) Old 03-14-2019, 11:26 AM
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Quote:
Originally Posted by 2014 Sorento LX View Post
where did it go?
Best answered by a dealer under warranty????
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post #6 of 20 (permalink) Old 03-14-2019, 11:36 AM
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It may have a slow leak and you lost some. Gaskets dry up if AC doesn't run for a while.
Best practice is to turn AC on for at least 15 mins once a month!
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post #7 of 20 (permalink) Old 03-14-2019, 11:51 AM
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,,,Best practice is to turn AC on for at least 15 mins once a month!
Ideal indeed...
....in my place, for at least 4 months, temperatures well below freezing would inhibit it from running....

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post #8 of 20 (permalink) Old 03-14-2019, 01:13 PM
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If you can keep car in garage with temps in +10C or so then you can run AC once in a while.
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post #9 of 20 (permalink) Old 03-20-2019, 10:10 AM
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Quote:
Originally Posted by 2014 Sorento LX View Post
wouldn't have thought it in a million years, but it was low on refrigerant, the question is where did it go? it blew super cold last year, on a 90 degree day you were cutting it back after about 10 mins. I even commented to my wife I didn't think I had ever felt such a cold A/C.
I agree on if under warranty have them look at it before any other work done.

If not under warranty larger leaks can be detected with proper equipment but tough. Speaking in general not your specific car, you can look at back of compressor, and all the lines to see if you can see anything that looks a little oily and dirt collecting.

There are small orings in the system that can start leaking as well as lines have been known to go bad, and the worst it could be leaking in the coil in the dash.

Looks at parts details for your specific car and you will see all the point it connects together and start looking at those places first.

Get a thermometer so that you can test the temp coming out the vents best taken after running a while in the shade. Take temp once a week. This will give you a quick idea of how large a leak you have. A week of time running the AC for several hours operating at full pressure is a good indicator of how bad the leak is.

Honestly while not the most environmental concept if a small charge (part of a can) once a year fixes it, then not worth tearing into the system. If you are adding refrigerant monthly you probably should find the issue and fix it since you could end up with a low oil issue and causes more damage.

To qualify I am not a mechanic just had issue a few time previously in life.
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post #10 of 20 (permalink) Old 03-20-2019, 10:23 AM
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Its common to have AC fail over the winter. Small leaks typically release enough refrigerant over that time. If defrost is used in the winter it does help keep the system healthy since it activates the AC compressor for better defrosting by removing moisture.

A fresh charge would last the summer and back at it again the next year recharging. Unless you get the problem fixed. There is nothing crazy about this happening. Its normal on many older vehicles.

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