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Why would my ac on a 2002 jetta just stop blowing cold air?

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Any number of reasons: Low or out of freon; compressor shot; relay circuit or switch bad on compressor; dash switch bad.

Posted on Oct 25, 2012

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There are a variety of reasons. If there is a slow leak on your AC lines, once the pressure falls below a certain value, the compressor cut-off switch will no longer allow it to come on. Many times when a car stops blowing cold air, it has to do with either the AC compressor or a leak in the lines, though there are other possibilities.

If you take your car down to a Pep Boys, you can ask for a free AC check and they will check the pressure on your lines. If there is appropriate pressure, then you can tell generally that it is a component of your AC system, most likely the compressor. If there is no pressure, you can have them refill the freon, but bear in mind that it will eventually leak out again unless you have them find the leak and fix it.

Posted on Oct 25, 2012

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Posted on Jan 02, 2017

MNfisherman
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SOURCE: Jeep AC blows cold air at defrost and feet but not through vents

There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

Posted on Jul 01, 2009

  • 257 Answers

SOURCE: where is ac fuse on 2007 jetta wolfsburg edition

Hopefully it is a fuse - when the a/c goes out it's usually not a fuse... It could be the compressor, or the fan module or the pressure switch.

Here are some fuses to check:
For compressor/module
fuse
#4 on panel C
fuse #16 on panel C
fuse #40 on panel C
fuse #46 on panel C
fuse #6 on panel A

For fans:
200 amp Fuse #1 on fuse panel A
50 amp fuse #3 on fuse panel A
10 amp fuse #24 on fuse panel B

Fuse Panel A and B are located engine compartment drivers side near battery. B is the top surface with low amperage fuses, A is the front surface with high amperage metal strip fuses.

Fuse panel C is on the driver's side of the dashboard - you have to open driver's door to get to it.

The smaller of the two cooling fans should be the one that actuates only when the a/c is turned on. The larger one should actuate when the engine is running.

Posted on Jul 11, 2009

  • 3 Answers

SOURCE: My A/C will not blow cold on 2002 jetta 1.8t

The problem is the temperature blend door. Very costly to fix. I have a 2003 with the same problem. A diverter flap door that allows it to switch over from heat to air, is broken. The part is 400.00 and the labor itself is 800.00. The whole dash needs to come off. Everything is behind the dash. Sorry!

Posted on Sep 01, 2009

  • 1 Answer

SOURCE: 2002 ML320 - The ac is not blowing cold air

I just had the same prob. Your air blend door actuator has probably gone bad. Take off the glove box and look 4 a little black plastic box(oddly shaped)with white plastic arms connected to it. Turn the knob from heat to cold. If those arms dont move thats your problem. Or when u turn the knob, u hear a clickig noise inside the dash, thats also the air door actuator.

Posted on Dec 15, 2009

kapishtech
  • 2272 Answers

SOURCE: I have an Acura MDX 2002 and the Air conditioning

Turn the AC on/off couple of times randomly.Then check.If same problem.Try adjusting the temperature setting to proper cold.But if still the same problem. Then get the ac pressure tested.The ac pressure test will let you know if there is any kind of leak in the ac cooling system.If there is a leak of ac cooling refrigerant then this can be the reason. If the ac refrigerant is checked out low then this can be the one reason,get the refrigerant recharged then check out.If still the same problem then the compressor needs to be checked.Is the compressor turning on or not at all turning.If its not turning on then the compressor relay needs to be checked.If compressor relay checks out ok then its faulty compressor,.Also check out for any kind of vacuum leak.Get all the vacuum line and vacuum hoses checked and confirmed that there is no vacuum leak. Also check your ac cabin filter .If its blocked by dust and clogged it will not let the ac run. The filter isn't too much of a challenge to change actually. Shouldn't even require any tools.
Basically, you grip the bottom of the glove box housing and start pulling it away from the dash panel. The whole assembly is held in by 10 spring clips that will release. Disconnect the two wire harnesses that go to the trunk lid main switch and the glove box light and that's it. The filter holder is now accessable and you pull it out of the slot, replace the filter and reinstall the holder into the housing. Replug the trunk lid main switch and glove box light harnesses and then align the spring clips to their slots in the dash and push the glove box assembly back into place.
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

Posted on Sep 02, 2010

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The problem is the temperature blend door. Very costly to fix. I have a 2003 with the same problem. A diverter flap door that allows it to switch over from heat to air, is broken. The part is 400.00 and the labor itself is 800.00. The whole dash needs to come off. Everything is behind the dash. Sorry!

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