Not sure if this is a CCU Problem?

[JW]

When I run my AC after I start my car, I find that the temperature is decently cool, but after running it for about a half and hour, it is not keeping up as well, when the outside temperature is 28 to 33 degrees Celsius or 80 to 90 degrees Fahrenheit. If I have the AC turned off, the temperature set at 18 degrees Celsius (approx. 64 degrees Fahrenheit) and set to bring in fresh air, I am finding that the air being circulated is a lot hotter than the air on the outside of the car. Having said that, I changed the setting from fresh air to recirculated air, with the windows open, thinking that the cooler air being brought in would cool the air coming out of the vents. I think the air was just as hot as when I had it set to fresh air. This doesn't make sense. Has anyone run into this before?

09 Jetta TDI White
91 NSX Red/Black

 

[Jason-nsx]

Contact briank he's the a/c guru.

 

[Briank]

Could be a CCU issue, run the test procedure.

http://www.nsxprime.com/wiki/Troubleshooting_the_Climate_Control_System

 

[angus]

Or the heater valve is stuck open or broken inside - I had this.

 

[dablackgoku1234]

For troubleshooting the CCU, do you start the engine or turn the key to II?

 

[Briank]

For troubleshooting the CCU, do you start the engine or turn the key to II?

To run the test procedure the engine does not need to be running.

 

[JW]

Or the heater valve is stuck open or broken inside - I had this.

I have not had time to check out the codes for the CCU, but this sound more like the problem that I am having. Another reason to think this is back when I took possession of my car in Sept of 2010, I found that I had to drive with the AC on when normally you would drive with the windows down or the temp set at a lower temp. It still always seemed warm inside the car, I will check out the codes and if all else fails, I will have to take a look at the heater valve.

09 Jetta TDI White
91 NSX Red/Black

 

[shawn110975]

one question do you have a ducted hood? some people with a ducted hood are saying their fresh air is hotter than normal.

 

[JW]

one question do you have a ducted hood? some people with a ducted hood are saying their fresh air is hotter than normal.

No I don't have a ducted hood, just the oem one. But now that you have mentioned that, I can see the air coming out through the duct and and passing right into the fresh air intake. Makes total sense.

09 VW Jetta TDI
91 NSX red/black