07 jetta a/c problem?

(2010-05-28 00:22:44) 1. Daniel Says: well i noticed when the car is in neutral and i turn on the a/c, the a/c fan does not come on by the radiator. what this does is just blows in warm air through the vents. The weird thing is when i start driving for couple min. with the a/c on, the air starts to cold...? and when its in neutral it comes back with warm air. What problem could this be?2. Enrique R Says: First off there isn't a sight glass on this car. That was back in the day. Secondly, yes that is a problem. Your cooling fans arn't coming on at idle when they should. The fact that you feel cold air when you drive is just because as you drive, the airflow going through the front of the engine helps cool off the condenser. This is actually a common problem on Jettas. The brushes on the electric motor in the fan wear out. Nothing you can do about it. Just get some new fans and install them. Pretty easy. Just four screws, and the fans slide out from underneath the car.3. John F Says: This isn't a problem. The thing is that the fans usually start working when you start driving for a couple of minutes. Another thing you can do to get the car cooler is to use AC refrigerant I think that's what it is called. Go to NAPA or Auto-Zone or target and u can get some. At the auto shops like NAPA they will show you how to connect it and use it.4. Motorhead Says: AC does not normally put out much at idle. You need to rev the engine before you really get any good AC output.
So I can't really tell if there is anything wrong at all.

If the output is less then it used to be, then you are probably simply low on freon.
But do not put more freon in unless you see bubbles in the reciever/dryer sight glass (cylinder after the condenser, near radiator). Too much freon will blow the pump.

But it does not sound like anything is wrong unless the car starts to overheat and the radiator fans still do not go on.
And by the way, the fan on the radiator is for the radiator really, not the AC.5. schatz Says: I agree with the last answerer (Enrique)..but before going to the fan,I would first look at the two 30A fuses on the battery first (depending on type of jetta/model year), these fuses easily give up due to heavy current draw from the fan motor.
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