Is this how the A/C should work????

TUBBY · Oct 16th, 2003, 03:42 PM

Hey guys hopefully you can help me out. I had my 2003 Sentra GXE in the shop last week because I don't think my A/C is working correctly. They said it was working fine but you be the judge and let me know if if it is me or my car that has gone looney.

Here is the situation. When the selector knob is on vent and the car is turned on, the A/C can be turned on and off. This is verified by a rise ion RPM when on and the compressor can be clearly seen going on and then off once turned off.

Then, as it should, when the selector knob is turned to defrost the A/C turns on and the green light does not eluminate.

Here is the problem. If the selector knob is turned back to vent the A/C does not turn off. Push the button in and the green light comes on, push the button out and the green light goes off, but the compressor keeps running. When the fan speed dial is turned to 0 then it will shut off but will remain on once it is turned back to 1.

The only way to get the A/C to not run when the vent is on at this point is to turn the car off and restart it. As well, if the car is turned on while on defrost the A/C will constantly be on.

So, what do you think???????

**chimmike** · Oct 16th, 2003, 04:01 PM

that's normal when on vent.

sr20dem0n · Oct 16th, 2003, 04:43 PM

When you put it on defrost the AC is supposed to turn on whether or not the button is pushed in, but when you turn it off of defrost it is supposed to go by the button. You're saying that when you turn it off of defrost the AC still stays on whether or not the button is pushed in right? That's what I picked up from your post, it shouldn't be doing that.

simeronbugh · Oct 16th, 2003, 05:35 PM

Quote:

Originally posted by chimmike
that's normal when on vent.

You should be able to run the vent without A/C.

simeronbugh · Oct 16th, 2003, 05:45 PM

That is not normal. Once you turn off the defrost to something else, it should shut off the compressor (compressor is used only for defrost to take moisture out of the air/and cooling when a/c is engaged). When you turn off the defrost/a/c the compressor should stop running, period. If it doesn't, there is a problem.

BlueSpecV03 · Oct 16th, 2003, 06:17 PM

My car also does the same. Once u switch to defrost, the AC stays on till the car shuts off.

Stupid if u ask me.

TUBBY · Oct 16th, 2003, 08:36 PM

sr20dem0n, you are correct that is what I was getting at. Once you go from defrost back to vent the A/C will not shut off.

BlueSpecV03, I agree very stupid. I wonder if theis problem is wide spread if yours does it too.

Maybe I will try and compare it to another car at the dealer. If it is the same I guess it is a very poor design, and if not then there is a problem.

Unless somebody else has some advice.

trance34 · Oct 17th, 2003, 11:18 AM

Doesn't happen on my 2k se.

When I turn on the defrost the AC compressor kicks on, but when I turn of defrost and go to vent it shuts down.

MDMA · Oct 17th, 2003, 01:11 PM

I think he is talking about the cold air still coming out of the vents even when the car a/c is turned off. That is normal with these cars... If your not talking about that and your SURE the compressor is still on after you shut the a/c or defrost off then that is not normal.

TUBBY · Oct 17th, 2003, 03:03 PM

I am possitive the compressor is still on. I have confirmed this visually.

Thanks for the help guys, I am convinced this should not be happening.

Oct 18th, 2003, 05:45 PM

yes it should be this is normal, nissan as well as many many american and other forign car builders use this method, it is very injenious accualy, it knows that if you have the defrost on it is because of an increse in moisture in the air so it automaticaly stays on to keep the moisture to a minimum the is one way to shut it off with out shutting off the car turn the fan to 0 that will turn it off

simeronbugh · Oct 19th, 2003, 10:26 AM

Quote:

Originally posted by nissanboy81
one way to shut it off with out shutting off the car turn the fan to 0 that will turn it off

He said when he turns the fan back on, the a/c turns back on.

cademetz · Oct 19th, 2003, 12:27 PM

I've got pretty much the same issue. Compressor comes as it should when the selector is on defrost. However, I could have never used the defrost and the compressor will come if I have it on vent and heat... and the compressor still kicks on. Now that shouldn't be normal.

Lazarus_023 · Oct 20th, 2003, 09:14 PM

Quote:

Originally posted by TUBBY
Hey guys hopefully you can help me out. I had my 2003 Sentra GXE in the shop last week because I don't think my A/C is working correctly. They said it was working fine but you be the judge and let me know if if it is me or my car that has gone looney.

Here is the situation. When the selector knob is on vent and the car is turned on, the A/C can be turned on and off. This is verified by a rise ion RPM when on and the compressor can be clearly seen going on and then off once turned off.

Then, as it should, when the selector knob is turned to defrost the A/C turns on and the green light does not eluminate.

Here is the problem. If the selector knob is turned back to vent the A/C does not turn off. Push the button in and the green light comes on, push the button out and the green light goes off, but the compressor keeps running. When the fan speed dial is turned to 0 then it will shut off but will remain on once it is turned back to 1.

The only way to get the A/C to not run when the vent is on at this point is to turn the car off and restart it. As well, if the car is turned on while on defrost the A/C will constantly be on.

So, what do you think???????

absolutely right. you have to turn the car off to turn off the ac after using defrost. nissan sucks. the altima guys have the same problem.

TUBBY · Oct 21st, 2003, 08:33 AM

Wow, if this is the way it was designed Nissan does suck. There are probably thousands of people driving around with there A/C on and don't even know it. Why would they do this? Why would they force people to get less milage and have less power. I does not make sense.