Hi to all,
Since two days, I've expierienced a problem with AC in my MO.
At the beginning, it was like when I was staying in the traffic jam, or just stayying, even the AC was turned on, there was no cold air commingg out. The rpm's was in normal (around 750rpm, it is the first bar before 1000rpm).
Then, when I was driving fast, the AC was working, cold air was comming out.
At the end, yesterday on the highway, I was going around 180-200kmh (110-120mph), and the AC was not working at all.
I went to Nissan dealer, immieadetly, to check the problem.
What they found was:
1. No cold air comming out,
2. Fan is turning on, when AC is turned on,
3. Compressor is not turning on (usualy you can hear this when it is turning on),
4. No faults in the computer unit,
5. Pressure by H and L in AC unit was 8 bar (116 PSI, 800kPa)
And now is the problem: we couldnt find out, what is the correct pressure in the unit. There is no information on the label in MO, no information in the manual, and I also couldn't find it out in internet.
The only thing they found was in their documentation for european MO (2005) that the H pressure should be between 1 something and 24 something bar (my MO is US version 2003) so they didn't wanted to play with this without detail information, not to break the system.
After some search (it was already late, so they want to close service) we agreed to check on that later. So I drove back withou working AC.
And now the surprice: when I went on highway again, and start do drive fast (over 4000rpm, 110mph), the AC did turned on again, and start working.
Now the questions:
1. Anybody did have the same problem?
2. What is the correct pressure in the AC system in 2003 MO US version (SE AWD).
I'm confused. As maybe some one from you know, in about 1 Month I've changed the alternator (recall issue), and also computer for AWD unit, with the AWD swith (don't think this is somehow connected).
It does not seems to be broken ... maybe some cabel or conector, because of the heat is circuting and the compressor is not turning on.
In US there was no problem with AC, it was working fine, even the temperatures was much more higher than in EU (Alabama), but I never was driving so fast in US
like I'm driving here 
Any advise or information will be appreciated.
Thanks
Mateusz
Since two days, I've expierienced a problem with AC in my MO.
At the beginning, it was like when I was staying in the traffic jam, or just stayying, even the AC was turned on, there was no cold air commingg out. The rpm's was in normal (around 750rpm, it is the first bar before 1000rpm).
Then, when I was driving fast, the AC was working, cold air was comming out.
At the end, yesterday on the highway, I was going around 180-200kmh (110-120mph), and the AC was not working at all.
I went to Nissan dealer, immieadetly, to check the problem.
What they found was:
1. No cold air comming out,
2. Fan is turning on, when AC is turned on,
3. Compressor is not turning on (usualy you can hear this when it is turning on),
4. No faults in the computer unit,
5. Pressure by H and L in AC unit was 8 bar (116 PSI, 800kPa)
And now is the problem: we couldnt find out, what is the correct pressure in the unit. There is no information on the label in MO, no information in the manual, and I also couldn't find it out in internet.
The only thing they found was in their documentation for european MO (2005) that the H pressure should be between 1 something and 24 something bar (my MO is US version 2003) so they didn't wanted to play with this without detail information, not to break the system.
After some search (it was already late, so they want to close service) we agreed to check on that later. So I drove back withou working AC.
And now the surprice: when I went on highway again, and start do drive fast (over 4000rpm, 110mph), the AC did turned on again, and start working.
Now the questions:
1. Anybody did have the same problem?
2. What is the correct pressure in the AC system in 2003 MO US version (SE AWD).
I'm confused. As maybe some one from you know, in about 1 Month I've changed the alternator (recall issue), and also computer for AWD unit, with the AWD swith (don't think this is somehow connected).
It does not seems to be broken ... maybe some cabel or conector, because of the heat is circuting and the compressor is not turning on.
In US there was no problem with AC, it was working fine, even the temperatures was much more higher than in EU (Alabama), but I never was driving so fast in US
Any advise or information will be appreciated.
Thanks
Mateusz