Air conditioning not cooling

I just replaced the same parts on my friend's 2013. Still not cooling right. High side pressure too low at 150 PSI, low side pressure too high at 75 PSI. It looks like there is a problem on the high pressure line that feeds the evaporator in the dash, and not providing the restriction needed to drop the low side pressure to about 40 PSI. I will check this soon and hope that's it.

Did you replace the thermostatic expansion valve in the firewall

I am having the same problem what is the fix

Same issue here and there is aTech told me maybe compressor control valve Or expansion valve.

The most common problem with this particular compressor is usually not a failure of the compressor itself. Instead it may be due to a faulty control valve. Along with cooling loss, common symptoms include air from the vent that is merely fresh or even somewhat warm. Suction pressures will be above normal, anywhere from 45-80psi, while the discharge pressure will remain somewhat normal or below normal. This electronic control valve is located on the rear/bottom plate of your compressor with a 2 wire detachable plug.

Change out the compressor control valve it completely fixed issue with my 2014 nissan altima. Bought the part on Ebay

I have a 2016 and it’s doing the same thing, where is the compressor control valve located?

I'm having the same problem on my 2014 Nissan Altima. It only has 50K miles but AC wasn't getting cold; Took it to dealership they told me $1200 to replace the compressor. I paid them the $1200 and it is still not getting cold. I was so furious. However, Never did say anything to the dealership; just figured I got ripped off; My daughters 2013 Hyndai elantra A/C runs way better; I'm thinking I need to go back to the dealership and say something. It hasn't been a year. I don't want to deal with another hot summer.

If you've lived long enough you'll realize that mechanics in dealerships are only good for replacing parts. They even have the nerve to tell you that it's fixed and working correctly even though you know better. Better to develop a relationship with an independent mechanic. The alternative in this case is going to an automotive AC business that works on this stuff all the time. They are NOT cheap.

That's not correct. We're good for fixing all the crap you tear up because of ignorance.

I followed the recommendation of changing the compressor control vale and that was the fix! I know this is an old thread but I had to add my experience to hopefully help someone else. The a/c was blowing nothing but hot hot air. Had the a/c system drained, changed the valve, (which is easy to get to - it's underneath the car, right side), Took about 10 minutes. t's held in by a snap ring. Now my a/c works like brand new again. Thanks to all who suggested changing that!!

I'm having the same issue here, will look for the location of the control valve, I'll hope it's the fix, as mine has been blowing pure heat in this weather! Is it a necessity to drain the AC system to replace the valve?

Im having the same issue as well i have a 2014 altima. I changed out the compressor and tried to put freon in but it doesn't take and the gauge says see tech

im having a problem with my 2009 Nissan Altima 2.5s the ac is blowing hot air ive replaced the compressor/ ac pressure switch/ drier checked all the fuses I could reach ive recharged it as well and still nothing I need help asap

If your Ac is warm at idle, takes forever to get cold and you have to keep it low to feel cool a new refrigerant control valve solenoid will probably fix that. The RCV will get weak or die messing up your AC, my 2014 Altima exhibited all these issues and manifold gauges showed that my low side would never get below 50psi no matter how much refrigerant I had or what the high side did. This valve is a known issue and the mechanics would have you replace the whole AC instead of this easy fix. This valve is clearly accessible from under the car on mine I just drove up on mini ramps and was able to remove directly with snap ring pliers, you need to have ac evacuated 1st of course. There are guides on youtube to assist. After I switched valves and refilled it was like getting a new car, ac comes to life quickly now and is almost too cold!

I referred to this thread as my vehicle was doing the same thing. I had the compressor control valve replaced and my ac is back to working. I have a 2013 Altima

It should be noted that its the SV/SL models that have a replaceable ac solenoid the S/Base models dont have it.

Where is the expansion valve located on 2013 Nissan Altima ?

Same here 2013 Altima SL. When it would get over 100 it would not cool. At lower outside temperature it would cool but it was not cold. Low side was around 65 psi, after I replaced the valve it was at 45 and cooled like new again at all temperatures.

Part is located at the back of the compressor. Easily accessible by lifting the car up on the front passenger side. It's held in by a snap ring,

Thank you for this page. I have a 2013 Altima and I had all these symptoms. Seems like car was ok at Temps below 80. After that the only way I would get any kind of cool air was when I was driving. And even then it wasn't great. Took it to a shop and they replaced a valve which I assumed was the ac compressor control valve but it was the block type expansion valve and I was still having issues. I bought it on ebay and took it to another shop and got it put in. Works great.

Does anyone mind sharing the price they paid to have a shop install the part assuming I supply the part? Just checking to see if I want to do this myself or have a shop do it.

whatever they charge is prob too much you can get main tools loaned for free at autozone. aside from a way to safely lift the front of the car "I had basic ramps" you'll need snap ring pliers to get valve out, then for refilling a manifold gauge, vacuum and refrigerant cans with a can tap to feed it in. this really isnt hard you need a few hours because of needed time to do a proper vacuum and test which im sure your mechanic would skip. watch this. https://youtu.be/lcrF1SB2iz0

How do I change the a.c control valve on the a compressor? 2013 altima.

same as this guys car just watch https://youtu.be/lcrF1SB2iz0

I can confirm that the compressor control valve is the problem. Dealership said to change the compressor for $1300. No way. Bought the control valve on ebay, took it to a mechanic. At first he said that's probably not the problem. I told him just replace it. Only reason i didn't change myself is because i didn't want to deal with Freon. He changed it out and noticed that the low side pressure was a lot better. AC blows freezing cold now even in 100 deg Texas weather while idle. Bought the part for $33 on ebay. Autozone has it listed for $83. Mechanic charged $120. Total cost $153. Ladies and gentlemen, for less than $200 you can solve this problem. Sad that Nissan has not cone out in the open to acknowledge that this valve is the problem. People busy wasting money changing out the compressor.

So what is the fix for an S model that doesnt have that solenoid?

Michael is providing incomplete/misleading information. There is a mechanical control valve that is replaceable on the S model with manual climate control. That valve is designed to work off of pressure. The TXV is working to balance the flow of refrigerant based on the outlet temp of the evaporator. With a higher heat load, the TXV admits more refrigerant to the evaporator with an increase in pressure. The control valve sees the pressure increase and releases pressure from the back side of the swash plate/pistons allowing for greater pumping. As the heat load comes down on the evaporator so does the pressure and the control valve admits discharge pressure to the back side of the swash plate, causing the pressure on both sides of the pistons to be more equal, lowering the pumping action. For the electric controlled valve this is handled by the computer. Both valves work to change the swash plate angle, affecting the pumping action and system pressures. Replacing the compressor also replaces the valve as it should be included. So if you've replaced the compressor (with the new valve already included), then you may have a different issue. I have ordered a valve for my compressor and plan to replace it soon. The attached photos are for reference only. You should check your specific compressor to find the correct parts for your application.

I have the same issue i already change the compressor, expansion valve and condenser and car is still blowing hot air i have also flush the lines and no luck. not sure what to do anymore does any one know what else could be ?

@GuruDVDN434. You haven't provided enough information about the vehicle. Does it have the Auto climate control? If so, the pumping action of the compressor is ultimately controlled by the computer for the climate control. A bad sensor could be telling the computer that it's already cold so it doesn't pump enough for the actual heat load. You could start by checking the temp of the compressor discharge line near the compressor- if the compressor is pumping like it should when the interior is hot, the discharge line should be very hot. Make sure the system has been vacuumed (and no leaks) completely and charged with the correct weight of refrigerant.

I have a 2013 Altima 2.5 S which does not have the solenoid. Anyone knows the fix for that?

@Anirudh. There can still be a mechanical valve in the compressor. They typically use a bellows to help maintain suction side pressure. They can stick after years of use. It's likely on the back side facing the engine block and held in by a C clip. You should get the model # off the label on your compressor so you can look it up, check some photos online. You need to make sure it has the correct charge and see if pressures change when it's running. The compressor will pump a little even with a bad valve. Models without the Auto climate can have the mechanical valve ad shown in the attached photo, circled in red.