Nissan Primera Owners Club Nissan Primera Owners Club > General Open Forums - NO TRADING! > Nissan Primera Help & Queries
  New Posts New Posts RSS Feed - Nissan primera P12 AC not cooling
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Nissan primera P12 AC not cooling

 Post Reply Post Reply
Author
Message
petterg View Drop Down
NPOC Guest
NPOC Guest


Joined: 01 Jun 2014
Location: Norway
Online Status: Offline
Points: 332
Post Options Post Options   Thanks (0) Thanks(0)   Quote petterg Quote  Post ReplyReply Direct Link To This Post Topic: Nissan primera P12 AC not cooling
    Posted: 27 May 2018 at 10:22pm
Nissan Primera 2004 (post facelift) P12, 1.9dci (F9Q)

As the weather turned hot, the AC stopped cooling. It worked all winter for defrosting. When AC button is pressed, the AC light comes on, AC is shown in display and fan speeds up automatically. But the air flow doesn't cool down and there is no change to the engine sound when starting AC on idle. (I'm quite sure I could hear the rpm drop a tiny bit when pressing the button while engine was idling before this problem occurred.)

In FSM page ATC79 it's says: "confirm that the compressor clutch engages (sound or visual inspection)". As I can't hear the clutch engage I imagine two possible causes: 1) electrical circuit faulty (shouldn't that cause the AC light to stay off?) or 2) clutch engages, but the compressor is broken so there is no extra load on the engine even when the clutch is engaged.

So I'd like to do the visual inspection. How do I do that? Where do I look in order to perform this visual inspection?
Back to Top
timeshock! View Drop Down
NPOC Member
NPOC Member
Avatar

Joined: 29 Jan 2006
Location: Newcastle
Online Status: Offline
Points: 13657
Post Options Post Options   Thanks (0) Thanks(0)   Quote timeshock! Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2018 at 10:38pm
I would think it more likely that you have lost your gas, this automatically disengages the clutch to prevent damage as there is no lubrication.
Back to Top
petterg View Drop Down
NPOC Guest
NPOC Guest


Joined: 01 Jun 2014
Location: Norway
Online Status: Offline
Points: 332
Post Options Post Options   Thanks (0) Thanks(0)   Quote petterg Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2018 at 8:50am
Is that an electrical sensor checking gas pressure? Is there a way to read data from this sensor? 
Back to Top
timeshock! View Drop Down
NPOC Member
NPOC Member
Avatar

Joined: 29 Jan 2006
Location: Newcastle
Online Status: Offline
Points: 13657
Post Options Post Options   Thanks (0) Thanks(0)   Quote timeshock! Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2018 at 10:59am
Even better, there is a full AC self diagnostic test you can run, however because it is a full test it is too complicated to replicate here
 

I recommend you download the free electronic service manual following the link below

 
Section ATC should sufficeThumbs Up
 
there is also a self diagnostic on the hidden menu
Back to Top
petterg View Drop Down
NPOC Guest
NPOC Guest


Joined: 01 Jun 2014
Location: Norway
Online Status: Offline
Points: 332
Post Options Post Options   Thanks (0) Thanks(0)   Quote petterg Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2018 at 5:55pm
As far as I can see, the self diag doesn't really do anything more than checking if the LED's work, and if it has connection with the sensors. It doesn't make any tests if the data is out of normal range for a working system. At least I didn't learn anything from the self diag - it just showed exactly what FSM describes. What the test actually should do is to show the sensors values, like when testing inside temperature sensor, the inside temperature should be shown. If it shows 10 degrees when you know the temperature is at least 40 degrees, you know the sensor data is wrong. The system cannot tell if the 10 degrees it reads from the sensor is right or wrong.

Gas pressure sensor is not mentioned as part of the self diag nor in the electrical circuit diagrams as far as I could see.
Back to Top
timeshock! View Drop Down
NPOC Member
NPOC Member
Avatar

Joined: 29 Jan 2006
Location: Newcastle
Online Status: Offline
Points: 13657
Post Options Post Options   Thanks (0) Thanks(0)   Quote timeshock! Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2018 at 9:37pm
Across here if you go for a re-gas the system will not charge the system if it detects the leak and the garage does not charge, this happened to me, I took it to a specialist and they did a free check to conclude the condenser had a hole in it, again no charge. Looking through the FSM apart from seeing if the clutch engages it looks like you need to manually check the pressure.
Back to Top
biglff View Drop Down
NPOC Guest
NPOC Guest
Avatar

Joined: 17 Jun 2015
Location: shannon
Online Status: Offline
Points: 2
Post Options Post Options   Thanks (0) Thanks(0)   Quote biglff Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jun 2018 at 8:31pm
Did you try changing the air filter if that isn’t working then it’s the Motor Fan Resistor just above the clutch with two screws
biglff
Back to Top
petterg View Drop Down
NPOC Guest
NPOC Guest


Joined: 01 Jun 2014
Location: Norway
Online Status: Offline
Points: 332
Post Options Post Options   Thanks (0) Thanks(0)   Quote petterg Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2018 at 11:34am
Motor fan resistor? That sounds like something for the ventilation fan, not for the AC. Are you sure that is related to the AC? (Ventilation fan is working, just that it blows warm air on hot days even when AC is on.
(I haven't had the time to go to a repair shop for checking gas.)
Back to Top
timeshock! View Drop Down
NPOC Member
NPOC Member
Avatar

Joined: 29 Jan 2006
Location: Newcastle
Online Status: Offline
Points: 13657
Post Options Post Options   Thanks (0) Thanks(0)   Quote timeshock! Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2018 at 12:23pm
Originally posted by petterg petterg wrote:

Motor fan resistor? That sounds like something for the ventilation fan, not for the AC. Are you sure that is related to the AC? (Ventilation fan is working, just that it blows warm air on hot days even when AC is on.
(I haven't had the time to go to a repair shop for checking gas.)
I concur
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down

This forum is optimised for a 1024x768 screen resolution

Copyright © 2001-2018 Nissan Primera Owners Club. All rights reserved.